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4243da4ff4
This is possible, because every given FFCodec has to implement exactly one of these. Doing so decreases sizeof(FFCodec) and therefore decreases the size of the binary. Notice that in case of position-independent code the decrease is in .data.rel.ro, so that this translates to decreased memory consumption. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
250 lines
7.6 KiB
C
250 lines
7.6 KiB
C
/*
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* Copyright (c) 2002 The FFmpeg Project
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "avcodec.h"
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#include "codec_internal.h"
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#include "h263.h"
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#include "mpegvideo.h"
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#include "mpegvideoenc.h"
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#include "msmpeg4.h"
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#include "msmpeg4enc.h"
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#include "msmpeg4data.h"
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#include "wmv2.h"
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#include "wmv2enc.h"
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typedef struct WMV2EncContext {
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MSMPEG4EncContext msmpeg4;
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WMV2Context common;
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int j_type_bit;
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int j_type;
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int abt_flag;
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int abt_type;
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int per_mb_abt;
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int mspel_bit;
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int cbp_table_index;
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int top_left_mv_flag;
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int per_mb_rl_bit;
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} WMV2EncContext;
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static int encode_ext_header(WMV2EncContext *w)
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{
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MpegEncContext *const s = &w->msmpeg4.s;
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PutBitContext pb;
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int code;
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init_put_bits(&pb, s->avctx->extradata, s->avctx->extradata_size);
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put_bits(&pb, 5, s->avctx->time_base.den / s->avctx->time_base.num); // yes 29.97 -> 29
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put_bits(&pb, 11, FFMIN(s->bit_rate / 1024, 2047));
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put_bits(&pb, 1, w->mspel_bit = 1);
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put_bits(&pb, 1, s->loop_filter);
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put_bits(&pb, 1, w->abt_flag = 1);
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put_bits(&pb, 1, w->j_type_bit = 1);
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put_bits(&pb, 1, w->top_left_mv_flag = 0);
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put_bits(&pb, 1, w->per_mb_rl_bit = 1);
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put_bits(&pb, 3, code = 1);
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flush_put_bits(&pb);
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s->slice_height = s->mb_height / code;
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return 0;
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}
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static av_cold int wmv2_encode_init(AVCodecContext *avctx)
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{
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WMV2EncContext *const w = avctx->priv_data;
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MpegEncContext *const s = &w->msmpeg4.s;
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s->private_ctx = &w->common;
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if (ff_mpv_encode_init(avctx) < 0)
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return -1;
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ff_wmv2_common_init(s);
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avctx->extradata_size = 4;
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avctx->extradata = av_mallocz(avctx->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
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if (!avctx->extradata)
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return AVERROR(ENOMEM);
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encode_ext_header(w);
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return 0;
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}
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int ff_wmv2_encode_picture_header(MpegEncContext *s, int picture_number)
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{
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WMV2EncContext *const w = (WMV2EncContext *) s;
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put_bits(&s->pb, 1, s->pict_type - 1);
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if (s->pict_type == AV_PICTURE_TYPE_I)
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put_bits(&s->pb, 7, 0);
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put_bits(&s->pb, 5, s->qscale);
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s->dc_table_index = 1;
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s->mv_table_index = 1; /* only if P-frame */
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s->per_mb_rl_table = 0;
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s->mspel = 0;
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w->per_mb_abt = 0;
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w->abt_type = 0;
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w->j_type = 0;
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av_assert0(s->flipflop_rounding);
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if (s->pict_type == AV_PICTURE_TYPE_I) {
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av_assert0(s->no_rounding == 1);
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if (w->j_type_bit)
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put_bits(&s->pb, 1, w->j_type);
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if (w->per_mb_rl_bit)
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put_bits(&s->pb, 1, s->per_mb_rl_table);
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if (!s->per_mb_rl_table) {
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ff_msmpeg4_code012(&s->pb, s->rl_chroma_table_index);
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ff_msmpeg4_code012(&s->pb, s->rl_table_index);
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}
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put_bits(&s->pb, 1, s->dc_table_index);
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s->inter_intra_pred = 0;
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} else {
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int cbp_index;
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put_bits(&s->pb, 2, SKIP_TYPE_NONE);
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ff_msmpeg4_code012(&s->pb, cbp_index = 0);
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w->cbp_table_index = wmv2_get_cbp_table_index(s, cbp_index);
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if (w->mspel_bit)
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put_bits(&s->pb, 1, s->mspel);
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if (w->abt_flag) {
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put_bits(&s->pb, 1, w->per_mb_abt ^ 1);
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if (!w->per_mb_abt)
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ff_msmpeg4_code012(&s->pb, w->abt_type);
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}
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if (w->per_mb_rl_bit)
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put_bits(&s->pb, 1, s->per_mb_rl_table);
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if (!s->per_mb_rl_table) {
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ff_msmpeg4_code012(&s->pb, s->rl_table_index);
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s->rl_chroma_table_index = s->rl_table_index;
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}
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put_bits(&s->pb, 1, s->dc_table_index);
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put_bits(&s->pb, 1, s->mv_table_index);
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s->inter_intra_pred = 0; // (s->width * s->height < 320 * 240 && s->bit_rate <= II_BITRATE);
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}
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s->esc3_level_length = 0;
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s->esc3_run_length = 0;
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return 0;
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}
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/* Nearly identical to wmv1 but that is just because we do not use the
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* useless M$ crap features. It is duplicated here in case someone wants
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* to add support for these crap features. */
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void ff_wmv2_encode_mb(MpegEncContext *s, int16_t block[6][64],
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int motion_x, int motion_y)
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{
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WMV2EncContext *const w = (WMV2EncContext *) s;
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int cbp, coded_cbp, i;
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int pred_x, pred_y;
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uint8_t *coded_block;
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ff_msmpeg4_handle_slices(s);
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if (!s->mb_intra) {
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/* compute cbp */
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cbp = 0;
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for (i = 0; i < 6; i++)
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if (s->block_last_index[i] >= 0)
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cbp |= 1 << (5 - i);
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put_bits(&s->pb,
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ff_wmv2_inter_table[w->cbp_table_index][cbp + 64][1],
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ff_wmv2_inter_table[w->cbp_table_index][cbp + 64][0]);
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s->misc_bits += get_bits_diff(s);
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/* motion vector */
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ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
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ff_msmpeg4_encode_motion(s, motion_x - pred_x,
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motion_y - pred_y);
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s->mv_bits += get_bits_diff(s);
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} else {
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/* compute cbp */
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cbp = 0;
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coded_cbp = 0;
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for (i = 0; i < 6; i++) {
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int val, pred;
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val = (s->block_last_index[i] >= 1);
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cbp |= val << (5 - i);
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if (i < 4) {
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/* predict value for close blocks only for luma */
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pred = ff_msmpeg4_coded_block_pred(s, i, &coded_block);
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*coded_block = val;
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val = val ^ pred;
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}
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coded_cbp |= val << (5 - i);
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}
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if (s->pict_type == AV_PICTURE_TYPE_I)
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put_bits(&s->pb,
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ff_msmp4_mb_i_table[coded_cbp][1],
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ff_msmp4_mb_i_table[coded_cbp][0]);
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else
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put_bits(&s->pb,
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ff_wmv2_inter_table[w->cbp_table_index][cbp][1],
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ff_wmv2_inter_table[w->cbp_table_index][cbp][0]);
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put_bits(&s->pb, 1, 0); /* no AC prediction yet */
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if (s->inter_intra_pred) {
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s->h263_aic_dir = 0;
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put_bits(&s->pb,
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ff_table_inter_intra[s->h263_aic_dir][1],
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ff_table_inter_intra[s->h263_aic_dir][0]);
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}
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s->misc_bits += get_bits_diff(s);
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}
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for (i = 0; i < 6; i++)
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ff_msmpeg4_encode_block(s, block[i], i);
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if (s->mb_intra)
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s->i_tex_bits += get_bits_diff(s);
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else
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s->p_tex_bits += get_bits_diff(s);
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}
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const FFCodec ff_wmv2_encoder = {
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.p.name = "wmv2",
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.p.long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 8"),
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.p.type = AVMEDIA_TYPE_VIDEO,
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.p.id = AV_CODEC_ID_WMV2,
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.p.priv_class = &ff_mpv_enc_class,
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.priv_data_size = sizeof(WMV2EncContext),
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.init = wmv2_encode_init,
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FF_CODEC_ENCODE_CB(ff_mpv_encode_picture),
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.close = ff_mpv_encode_end,
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.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
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.p.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
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AV_PIX_FMT_NONE },
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};
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