343 lines
10 KiB
C
343 lines
10 KiB
C
/*
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* Copyright (c) 2003 Michael Niedermayer
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*
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* This file is part of Libav.
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*
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* Libav 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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* Libav 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 Libav; 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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/**
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* @file
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* ASUS V1/V2 encoder.
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*/
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#include "libavutil/attributes.h"
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#include "libavutil/mem.h"
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#include "asv.h"
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#include "avcodec.h"
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#include "fdctdsp.h"
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#include "mathops.h"
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#include "mpeg12data.h"
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static inline void asv2_put_bits(PutBitContext *pb, int n, int v)
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{
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put_bits(pb, n, ff_reverse[v << (8 - n)]);
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}
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static inline void asv1_put_level(PutBitContext *pb, int level)
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{
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unsigned int index = level + 3;
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if (index <= 6) {
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put_bits(pb, ff_asv_level_tab[index][1], ff_asv_level_tab[index][0]);
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} else {
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put_bits(pb, ff_asv_level_tab[3][1], ff_asv_level_tab[3][0]);
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put_sbits(pb, 8, level);
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}
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}
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static inline void asv2_put_level(PutBitContext *pb, int level)
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{
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unsigned int index = level + 31;
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if (index <= 62) {
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put_bits(pb, ff_asv2_level_tab[index][1], ff_asv2_level_tab[index][0]);
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} else {
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put_bits(pb, ff_asv2_level_tab[31][1], ff_asv2_level_tab[31][0]);
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asv2_put_bits(pb, 8, level & 0xFF);
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}
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}
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static inline void asv1_encode_block(ASV1Context *a, int16_t block[64])
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{
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int i;
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int nc_count = 0;
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put_bits(&a->pb, 8, (block[0] + 32) >> 6);
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block[0] = 0;
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for (i = 0; i < 10; i++) {
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const int index = ff_asv_scantab[4 * i];
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int ccp = 0;
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if ((block[index + 0] = (block[index + 0] *
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a->q_intra_matrix[index + 0] + (1 << 15)) >> 16))
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ccp |= 8;
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if ((block[index + 8] = (block[index + 8] *
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a->q_intra_matrix[index + 8] + (1 << 15)) >> 16))
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ccp |= 4;
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if ((block[index + 1] = (block[index + 1] *
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a->q_intra_matrix[index + 1] + (1 << 15)) >> 16))
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ccp |= 2;
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if ((block[index + 9] = (block[index + 9] *
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a->q_intra_matrix[index + 9] + (1 << 15)) >> 16))
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ccp |= 1;
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if (ccp) {
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for (; nc_count; nc_count--)
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put_bits(&a->pb, ff_asv_ccp_tab[0][1], ff_asv_ccp_tab[0][0]);
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put_bits(&a->pb, ff_asv_ccp_tab[ccp][1], ff_asv_ccp_tab[ccp][0]);
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if (ccp & 8)
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asv1_put_level(&a->pb, block[index + 0]);
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if (ccp & 4)
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asv1_put_level(&a->pb, block[index + 8]);
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if (ccp & 2)
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asv1_put_level(&a->pb, block[index + 1]);
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if (ccp & 1)
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asv1_put_level(&a->pb, block[index + 9]);
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} else {
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nc_count++;
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}
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}
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put_bits(&a->pb, ff_asv_ccp_tab[16][1], ff_asv_ccp_tab[16][0]);
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}
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static inline void asv2_encode_block(ASV1Context *a, int16_t block[64])
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{
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int i;
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int count = 0;
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for (count = 63; count > 3; count--) {
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const int index = ff_asv_scantab[count];
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if ((block[index] * a->q_intra_matrix[index] + (1 << 15)) >> 16)
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break;
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}
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count >>= 2;
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asv2_put_bits(&a->pb, 4, count);
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asv2_put_bits(&a->pb, 8, (block[0] + 32) >> 6);
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block[0] = 0;
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for (i = 0; i <= count; i++) {
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const int index = ff_asv_scantab[4 * i];
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int ccp = 0;
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if ((block[index + 0] = (block[index + 0] *
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a->q_intra_matrix[index + 0] + (1 << 15)) >> 16))
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ccp |= 8;
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if ((block[index + 8] = (block[index + 8] *
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a->q_intra_matrix[index + 8] + (1 << 15)) >> 16))
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ccp |= 4;
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if ((block[index + 1] = (block[index + 1] *
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a->q_intra_matrix[index + 1] + (1 << 15)) >> 16))
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ccp |= 2;
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if ((block[index + 9] = (block[index + 9] *
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a->q_intra_matrix[index + 9] + (1 << 15)) >> 16))
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ccp |= 1;
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assert(i || ccp < 8);
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if (i)
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put_bits(&a->pb, ff_asv_ac_ccp_tab[ccp][1], ff_asv_ac_ccp_tab[ccp][0]);
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else
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put_bits(&a->pb, ff_asv_dc_ccp_tab[ccp][1], ff_asv_dc_ccp_tab[ccp][0]);
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if (ccp) {
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if (ccp & 8)
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asv2_put_level(&a->pb, block[index + 0]);
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if (ccp & 4)
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asv2_put_level(&a->pb, block[index + 8]);
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if (ccp & 2)
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asv2_put_level(&a->pb, block[index + 1]);
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if (ccp & 1)
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asv2_put_level(&a->pb, block[index + 9]);
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}
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}
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}
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#define MAX_MB_SIZE (30 * 16 * 16 * 3 / 2 / 8)
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static inline int encode_mb(ASV1Context *a, int16_t block[6][64])
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{
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int i;
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if (a->pb.buf_end - a->pb.buf - (put_bits_count(&a->pb) >> 3) < MAX_MB_SIZE) {
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av_log(a->avctx, AV_LOG_ERROR, "encoded frame too large\n");
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return -1;
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}
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if (a->avctx->codec_id == AV_CODEC_ID_ASV1) {
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for (i = 0; i < 6; i++)
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asv1_encode_block(a, block[i]);
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} else {
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for (i = 0; i < 6; i++)
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asv2_encode_block(a, block[i]);
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}
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return 0;
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}
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static inline void dct_get(ASV1Context *a, const AVFrame *frame,
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int mb_x, int mb_y)
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{
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int16_t (*block)[64] = a->block;
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int linesize = frame->linesize[0];
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int i;
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uint8_t *ptr_y = frame->data[0] + (mb_y * 16 * linesize) + mb_x * 16;
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uint8_t *ptr_cb = frame->data[1] + (mb_y * 8 * frame->linesize[1]) + mb_x * 8;
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uint8_t *ptr_cr = frame->data[2] + (mb_y * 8 * frame->linesize[2]) + mb_x * 8;
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a->pdsp.get_pixels(block[0], ptr_y, linesize);
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a->pdsp.get_pixels(block[1], ptr_y + 8, linesize);
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a->pdsp.get_pixels(block[2], ptr_y + 8 * linesize, linesize);
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a->pdsp.get_pixels(block[3], ptr_y + 8 * linesize + 8, linesize);
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for (i = 0; i < 4; i++)
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a->fdsp.fdct(block[i]);
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if (!(a->avctx->flags & CODEC_FLAG_GRAY)) {
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a->pdsp.get_pixels(block[4], ptr_cb, frame->linesize[1]);
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a->pdsp.get_pixels(block[5], ptr_cr, frame->linesize[2]);
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for (i = 4; i < 6; i++)
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a->fdsp.fdct(block[i]);
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}
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}
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static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
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const AVFrame *pict, int *got_packet)
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{
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ASV1Context *const a = avctx->priv_data;
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int size, ret;
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int mb_x, mb_y;
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if (!pkt->data &&
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(ret = av_new_packet(pkt, a->mb_height * a->mb_width * MAX_MB_SIZE +
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FF_MIN_BUFFER_SIZE)) < 0) {
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av_log(avctx, AV_LOG_ERROR, "Error getting output packet.\n");
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return ret;
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}
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init_put_bits(&a->pb, pkt->data, pkt->size);
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for (mb_y = 0; mb_y < a->mb_height2; mb_y++) {
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for (mb_x = 0; mb_x < a->mb_width2; mb_x++) {
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dct_get(a, pict, mb_x, mb_y);
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encode_mb(a, a->block);
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}
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}
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if (a->mb_width2 != a->mb_width) {
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mb_x = a->mb_width2;
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for (mb_y = 0; mb_y < a->mb_height2; mb_y++) {
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dct_get(a, pict, mb_x, mb_y);
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encode_mb(a, a->block);
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}
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}
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if (a->mb_height2 != a->mb_height) {
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mb_y = a->mb_height2;
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for (mb_x = 0; mb_x < a->mb_width; mb_x++) {
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dct_get(a, pict, mb_x, mb_y);
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encode_mb(a, a->block);
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}
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}
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emms_c();
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avpriv_align_put_bits(&a->pb);
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while (put_bits_count(&a->pb) & 31)
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put_bits(&a->pb, 8, 0);
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size = put_bits_count(&a->pb) / 32;
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if (avctx->codec_id == AV_CODEC_ID_ASV1) {
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a->bbdsp.bswap_buf((uint32_t *) pkt->data,
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(uint32_t *) pkt->data, size);
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} else {
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int i;
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for (i = 0; i < 4 * size; i++)
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pkt->data[i] = ff_reverse[pkt->data[i]];
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}
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pkt->size = size * 4;
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pkt->flags |= AV_PKT_FLAG_KEY;
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*got_packet = 1;
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return 0;
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}
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static av_cold int encode_init(AVCodecContext *avctx)
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{
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ASV1Context *const a = avctx->priv_data;
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int i;
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const int scale = avctx->codec_id == AV_CODEC_ID_ASV1 ? 1 : 2;
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avctx->coded_frame = av_frame_alloc();
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if (!avctx->coded_frame)
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return AVERROR(ENOMEM);
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avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
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avctx->coded_frame->key_frame = 1;
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ff_asv_common_init(avctx);
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ff_fdctdsp_init(&a->fdsp, avctx);
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ff_pixblockdsp_init(&a->pdsp, avctx);
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if (avctx->global_quality == 0)
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avctx->global_quality = 4 * FF_QUALITY_SCALE;
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a->inv_qscale = (32 * scale * FF_QUALITY_SCALE +
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avctx->global_quality / 2) / avctx->global_quality;
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avctx->extradata = av_mallocz(8);
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avctx->extradata_size = 8;
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((uint32_t *) avctx->extradata)[0] = av_le2ne32(a->inv_qscale);
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((uint32_t *) avctx->extradata)[1] = av_le2ne32(AV_RL32("ASUS"));
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for (i = 0; i < 64; i++) {
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int q = 32 * scale * ff_mpeg1_default_intra_matrix[i];
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a->q_intra_matrix[i] = ((a->inv_qscale << 16) + q / 2) / q;
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}
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return 0;
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}
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static av_cold int asv_encode_close(AVCodecContext *avctx)
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{
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av_frame_free(&avctx->coded_frame);
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return 0;
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}
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#if CONFIG_ASV1_ENCODER
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AVCodec ff_asv1_encoder = {
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.name = "asv1",
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.long_name = NULL_IF_CONFIG_SMALL("ASUS V1"),
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.type = AVMEDIA_TYPE_VIDEO,
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.id = AV_CODEC_ID_ASV1,
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.priv_data_size = sizeof(ASV1Context),
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.init = encode_init,
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.encode2 = encode_frame,
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.close = asv_encode_close,
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.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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#endif
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#if CONFIG_ASV2_ENCODER
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AVCodec ff_asv2_encoder = {
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.name = "asv2",
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.long_name = NULL_IF_CONFIG_SMALL("ASUS V2"),
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.type = AVMEDIA_TYPE_VIDEO,
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.id = AV_CODEC_ID_ASV2,
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.priv_data_size = sizeof(ASV1Context),
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.init = encode_init,
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.encode2 = encode_frame,
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.close = asv_encode_close,
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.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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#endif
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