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Diffstat (limited to 'contrib/ffmpeg/libavcodec/h261enc.c')
-rw-r--r--contrib/ffmpeg/libavcodec/h261enc.c334
1 files changed, 0 insertions, 334 deletions
diff --git a/contrib/ffmpeg/libavcodec/h261enc.c b/contrib/ffmpeg/libavcodec/h261enc.c
deleted file mode 100644
index aea2549c7..000000000
--- a/contrib/ffmpeg/libavcodec/h261enc.c
+++ /dev/null
@@ -1,334 +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 h261enc.c
- * H.261 encoder.
- */
-
-#include "dsputil.h"
-#include "avcodec.h"
-#include "mpegvideo.h"
-#include "h261.h"
-#include "h261data.h"
-
-extern uint8_t ff_h261_rl_table_store[2][2*MAX_RUN + MAX_LEVEL + 3];
-
-static void h261_encode_block(H261Context * h, DCTELEM * block,
- int n);
-
-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;
-
- align_put_bits(&s->pb);
-
- /* Update the pointer to last GOB */
- s->ptr_lastgob = pbBufPtr(&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_bits(&s->pb, 5, temp_ref & 0x1f); /* 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;
- h->current_mba = 0;
-}
-
-/**
- * Encodes 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 */
- h->current_mba = 0;
- h->previous_mba = 0;
- h->current_mv_x=0;
- h->current_mv_y=0;
-}
-
-void ff_h261_reorder_mb_index(MpegEncContext* s){
- int index= s->mb_x + s->mb_y*s->mb_width;
-
- if(index % 33 == 0)
- h261_encode_gob_header(s,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,h261_mv_tab[code][1],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,h261_mv_tab[code][1],h261_mv_tab[code][0]);
- put_bits(&s->pb,1,sign);
- }
-}
-
-static inline int get_cbp(MpegEncContext * s,
- DCTELEM 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;
-}
-void ff_h261_encode_mb(MpegEncContext * s,
- DCTELEM 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->current_mba++;
- 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++;
- h->current_mv_x=0;
- h->current_mv_y=0;
- return;
- }
- }
-
- /* MB is not skipped, encode MBA */
- put_bits(&s->pb, h261_mba_bits[(h->current_mba-h->previous_mba)-1], h261_mba_code[(h->current_mba-h->previous_mba)-1]);
-
- /* 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++;
- assert(h->mtype > 1);
- }
-
- if(s->dquant)
- h->mtype++;
-
- put_bits(&s->pb, h261_mtype_bits[h->mtype], h261_mtype_code[h->mtype]);
-
- h->mtype = 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) - h->current_mv_x;
- mv_diff_y = (motion_y >> 1) - h->current_mv_y;
- h->current_mv_x = (motion_x >> 1);
- h->current_mv_y = (motion_y >> 1);
- h261_encode_motion(h,mv_diff_x);
- h261_encode_motion(h,mv_diff_y);
- }
-
- h->previous_mba = h->current_mba;
-
- if(HAS_CBP(h->mtype)){
- assert(cbp>0);
- put_bits(&s->pb,h261_cbp_tab[cbp-1][1],h261_cbp_tab[cbp-1][0]);
- }
- for(i=0; i<6; i++) {
- /* encode each block */
- h261_encode_block(h, block[i], i);
- }
-
- if ( ( h->current_mba == 11 ) || ( h->current_mba == 22 ) || ( h->current_mba == 33 ) || ( !IS_16X16 ( h->mtype ) )){
- h->current_mv_x=0;
- h->current_mv_y=0;
- }
-}
-
-void ff_h261_encode_init(MpegEncContext *s){
- static int done = 0;
-
- if (!done) {
- done = 1;
- init_rl(&h261_rl_tcoeff, ff_h261_rl_table_store);
- }
-
- s->min_qcoeff= -127;
- s->max_qcoeff= 127;
- s->y_dc_scale_table=
- s->c_dc_scale_table= ff_mpeg1_dc_scale_table;
-}
-
-
-/**
- * encodes a 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, DCTELEM * block, int n){
- MpegEncContext * const s = &h->s;
- int level, run, last, i, j, last_index, last_non_zero, sign, slevel, code;
- RLTable *rl;
-
- rl = &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;
- last = (i == last_index);
- 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);
- assert(slevel != 0);
- assert(level <= 127);
- put_bits(&s->pb, 8, slevel & 0xff);
- } 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]);// END OF BLOCK
- }
-}
-
-AVCodec h261_encoder = {
- "h261",
- CODEC_TYPE_VIDEO,
- CODEC_ID_H261,
- sizeof(H261Context),
- MPV_encode_init,
- MPV_encode_picture,
- MPV_encode_end,
- .pix_fmts= (enum PixelFormat[]){PIX_FMT_YUV420P, -1},
-};
-
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