mirror of https://git.ffmpeg.org/ffmpeg.git
1491 lines
47 KiB
C
1491 lines
47 KiB
C
/*
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* The simplest mpeg encoder (well, it was the simplest!)
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* Copyright (c) 2000,2001 Gerard Lantau.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <math.h>
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#include <string.h>
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#include "avcodec.h"
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#include "dsputil.h"
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#include "mpegvideo.h"
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#ifdef USE_FASTMEMCPY
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#include "fastmemcpy.h"
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#endif
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static void encode_picture(MpegEncContext *s, int picture_number);
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static void rate_control_init(MpegEncContext *s);
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static int rate_estimate_qscale(MpegEncContext *s);
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static void dct_unquantize_mpeg1_c(MpegEncContext *s,
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DCTELEM *block, int n, int qscale);
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static void dct_unquantize_h263_c(MpegEncContext *s,
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DCTELEM *block, int n, int qscale);
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static void draw_edges_c(UINT8 *buf, int wrap, int width, int height, int w);
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static int dct_quantize_c(MpegEncContext *s, DCTELEM *block, int n, int qscale);
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int (*dct_quantize)(MpegEncContext *s, DCTELEM *block, int n, int qscale)= dct_quantize_c;
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void (*draw_edges)(UINT8 *buf, int wrap, int width, int height, int w)= draw_edges_c;
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#define EDGE_WIDTH 16
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/* enable all paranoid tests for rounding, overflows, etc... */
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//#define PARANOID
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//#define DEBUG
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/* for jpeg fast DCT */
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#define CONST_BITS 14
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static const unsigned short aanscales[64] = {
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/* precomputed values scaled up by 14 bits */
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16384, 22725, 21407, 19266, 16384, 12873, 8867, 4520,
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22725, 31521, 29692, 26722, 22725, 17855, 12299, 6270,
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21407, 29692, 27969, 25172, 21407, 16819, 11585, 5906,
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19266, 26722, 25172, 22654, 19266, 15137, 10426, 5315,
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16384, 22725, 21407, 19266, 16384, 12873, 8867, 4520,
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12873, 17855, 16819, 15137, 12873, 10114, 6967, 3552,
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8867, 12299, 11585, 10426, 8867, 6967, 4799, 2446,
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4520, 6270, 5906, 5315, 4520, 3552, 2446, 1247
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};
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static UINT8 h263_chroma_roundtab[16] = {
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0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2,
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};
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/* default motion estimation */
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int motion_estimation_method = ME_LOG;
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extern UINT8 zigzag_end[64];
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static void convert_matrix(int *qmat, UINT16 *qmat16, const UINT16 *quant_matrix, int qscale)
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{
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int i;
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if (av_fdct == jpeg_fdct_ifast) {
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for(i=0;i<64;i++) {
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/* 16 <= qscale * quant_matrix[i] <= 7905 */
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/* 19952 <= aanscales[i] * qscale * quant_matrix[i] <= 249205026 */
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/* (1<<36)/19952 >= (1<<36)/(aanscales[i] * qscale * quant_matrix[i]) >= (1<<36)/249205026 */
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/* 3444240 >= (1<<36)/(aanscales[i] * qscale * quant_matrix[i]) >= 275 */
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qmat[block_permute_op(i)] = (int)((UINT64_C(1) << (QMAT_SHIFT + 11)) /
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(aanscales[i] * qscale * quant_matrix[block_permute_op(i)]));
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}
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} else {
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for(i=0;i<64;i++) {
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/* We can safely suppose that 16 <= quant_matrix[i] <= 255
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So 16 <= qscale * quant_matrix[i] <= 7905
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so (1<<19) / 16 >= (1<<19) / (qscale * quant_matrix[i]) >= (1<<19) / 7905
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so 32768 >= (1<<19) / (qscale * quant_matrix[i]) >= 67
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*/
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qmat[i] = (1 << QMAT_SHIFT_MMX) / (qscale * quant_matrix[i]);
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qmat16[i] = (1 << QMAT_SHIFT_MMX) / (qscale * quant_matrix[block_permute_op(i)]);
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}
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}
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}
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/* init common structure for both encoder and decoder */
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int MPV_common_init(MpegEncContext *s)
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{
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int c_size, i;
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UINT8 *pict;
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if (s->out_format == FMT_H263)
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s->dct_unquantize = dct_unquantize_h263_c;
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else
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s->dct_unquantize = dct_unquantize_mpeg1_c;
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#ifdef HAVE_MMX
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MPV_common_init_mmx(s);
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#endif
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s->mb_width = (s->width + 15) / 16;
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s->mb_height = (s->height + 15) / 16;
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s->linesize = s->mb_width * 16 + 2 * EDGE_WIDTH;
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for(i=0;i<3;i++) {
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int w, h, shift, pict_start;
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w = s->linesize;
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h = s->mb_height * 16 + 2 * EDGE_WIDTH;
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shift = (i == 0) ? 0 : 1;
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c_size = (w >> shift) * (h >> shift);
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pict_start = (w >> shift) * (EDGE_WIDTH >> shift) + (EDGE_WIDTH >> shift);
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pict = av_mallocz(c_size);
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if (pict == NULL)
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goto fail;
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s->last_picture_base[i] = pict;
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s->last_picture[i] = pict + pict_start;
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pict = av_mallocz(c_size);
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if (pict == NULL)
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goto fail;
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s->next_picture_base[i] = pict;
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s->next_picture[i] = pict + pict_start;
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if (s->has_b_frames) {
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pict = av_mallocz(c_size);
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if (pict == NULL)
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goto fail;
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s->aux_picture_base[i] = pict;
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s->aux_picture[i] = pict + pict_start;
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}
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}
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if (s->encoding) {
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/* Allocate MB type table */
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s->mb_type = malloc(s->mb_width * s->mb_height * sizeof(char));
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if (s->mb_type == NULL) {
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perror("malloc");
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goto fail;
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}
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/* Allocate MV table */
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/* By now we just have one MV per MB */
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s->mv_table[0] = malloc(s->mb_width * s->mb_height * sizeof(INT16));
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s->mv_table[1] = malloc(s->mb_width * s->mb_height * sizeof(INT16));
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if (s->mv_table[1] == NULL || s->mv_table[0] == NULL) {
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perror("malloc");
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goto fail;
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}
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}
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if (s->out_format == FMT_H263) {
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int size;
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/* MV prediction */
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size = (2 * s->mb_width + 2) * (2 * s->mb_height + 2);
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s->motion_val = malloc(size * 2 * sizeof(INT16));
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if (s->motion_val == NULL)
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goto fail;
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memset(s->motion_val, 0, size * 2 * sizeof(INT16));
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}
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if (s->h263_pred) {
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int y_size, c_size, i, size;
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/* dc values */
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y_size = (2 * s->mb_width + 2) * (2 * s->mb_height + 2);
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c_size = (s->mb_width + 2) * (s->mb_height + 2);
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size = y_size + 2 * c_size;
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s->dc_val[0] = malloc(size * sizeof(INT16));
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if (s->dc_val[0] == NULL)
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goto fail;
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s->dc_val[1] = s->dc_val[0] + y_size;
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s->dc_val[2] = s->dc_val[1] + c_size;
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for(i=0;i<size;i++)
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s->dc_val[0][i] = 1024;
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/* ac values */
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s->ac_val[0] = av_mallocz(size * sizeof(INT16) * 16);
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if (s->ac_val[0] == NULL)
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goto fail;
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s->ac_val[1] = s->ac_val[0] + y_size;
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s->ac_val[2] = s->ac_val[1] + c_size;
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/* cbp values */
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s->coded_block = av_mallocz(y_size);
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if (!s->coded_block)
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goto fail;
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/* which mb is a intra block */
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s->mbintra_table = av_mallocz(s->mb_width * s->mb_height);
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if (!s->mbintra_table)
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goto fail;
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memset(s->mbintra_table, 1, s->mb_width * s->mb_height);
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}
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/* default structure is frame */
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s->picture_structure = PICT_FRAME;
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/* init macroblock skip table */
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if (!s->encoding) {
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s->mbskip_table = av_mallocz(s->mb_width * s->mb_height);
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if (!s->mbskip_table)
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goto fail;
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}
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s->context_initialized = 1;
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return 0;
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fail:
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if (s->mb_type)
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free(s->mb_type);
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if (s->mv_table[0])
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free(s->mv_table[0]);
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if (s->mv_table[1])
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free(s->mv_table[1]);
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if (s->motion_val)
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free(s->motion_val);
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if (s->dc_val[0])
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free(s->dc_val[0]);
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if (s->ac_val[0])
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free(s->ac_val[0]);
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if (s->coded_block)
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free(s->coded_block);
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if (s->mbintra_table)
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free(s->mbintra_table);
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if (s->mbskip_table)
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free(s->mbskip_table);
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for(i=0;i<3;i++) {
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if (s->last_picture_base[i])
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free(s->last_picture_base[i]);
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if (s->next_picture_base[i])
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free(s->next_picture_base[i]);
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if (s->aux_picture_base[i])
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free(s->aux_picture_base[i]);
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}
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return -1;
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}
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/* init common structure for both encoder and decoder */
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void MPV_common_end(MpegEncContext *s)
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{
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int i;
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if (s->mb_type)
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free(s->mb_type);
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if (s->mv_table[0])
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free(s->mv_table[0]);
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if (s->mv_table[1])
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free(s->mv_table[1]);
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if (s->motion_val)
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free(s->motion_val);
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if (s->h263_pred) {
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free(s->dc_val[0]);
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free(s->ac_val[0]);
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free(s->coded_block);
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free(s->mbintra_table);
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}
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if (s->mbskip_table)
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free(s->mbskip_table);
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for(i=0;i<3;i++) {
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free(s->last_picture_base[i]);
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free(s->next_picture_base[i]);
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if (s->has_b_frames)
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free(s->aux_picture_base[i]);
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}
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s->context_initialized = 0;
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}
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/* init video encoder */
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int MPV_encode_init(AVCodecContext *avctx)
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{
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MpegEncContext *s = avctx->priv_data;
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int i;
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s->bit_rate = avctx->bit_rate;
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s->frame_rate = avctx->frame_rate;
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s->width = avctx->width;
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s->height = avctx->height;
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s->gop_size = avctx->gop_size;
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s->rtp_mode = avctx->rtp_mode;
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s->rtp_payload_size = avctx->rtp_payload_size;
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if (avctx->rtp_callback)
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s->rtp_callback = avctx->rtp_callback;
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s->avctx = avctx;
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if (s->gop_size <= 1) {
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s->intra_only = 1;
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s->gop_size = 12;
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} else {
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s->intra_only = 0;
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}
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s->full_search = motion_estimation_method;
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s->fixed_qscale = (avctx->flags & CODEC_FLAG_QSCALE);
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switch(avctx->codec->id) {
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case CODEC_ID_MPEG1VIDEO:
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s->out_format = FMT_MPEG1;
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break;
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case CODEC_ID_MJPEG:
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s->out_format = FMT_MJPEG;
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s->intra_only = 1; /* force intra only for jpeg */
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s->mjpeg_write_tables = 1; /* write all tables */
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s->mjpeg_vsample[0] = 2; /* set up default sampling factors */
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s->mjpeg_vsample[1] = 1; /* the only currently supported values */
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s->mjpeg_vsample[2] = 1;
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s->mjpeg_hsample[0] = 2;
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s->mjpeg_hsample[1] = 1;
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s->mjpeg_hsample[2] = 1;
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if (mjpeg_init(s) < 0)
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return -1;
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break;
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case CODEC_ID_H263:
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if (h263_get_picture_format(s->width, s->height) == 7) {
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printf("Input picture size isn't suitable for h263 codec! try h263+\n");
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return -1;
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}
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s->out_format = FMT_H263;
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break;
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case CODEC_ID_H263P:
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s->out_format = FMT_H263;
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s->rtp_mode = 1;
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s->rtp_payload_size = 1200;
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s->h263_plus = 1;
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s->unrestricted_mv = 1;
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/* These are just to be sure */
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s->umvplus = 0;
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s->umvplus_dec = 0;
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break;
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case CODEC_ID_RV10:
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s->out_format = FMT_H263;
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s->h263_rv10 = 1;
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break;
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case CODEC_ID_MPEG4:
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s->out_format = FMT_H263;
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s->h263_pred = 1;
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s->unrestricted_mv = 1;
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break;
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case CODEC_ID_MSMPEG4:
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s->out_format = FMT_H263;
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s->h263_msmpeg4 = 1;
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s->h263_pred = 1;
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s->unrestricted_mv = 1;
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break;
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default:
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return -1;
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}
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if (s->out_format == FMT_H263)
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h263_encode_init_vlc(s);
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s->encoding = 1;
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/* init */
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if (MPV_common_init(s) < 0)
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return -1;
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/* init default q matrix */
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for(i=0;i<64;i++) {
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s->intra_matrix[i] = default_intra_matrix[i];
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s->non_intra_matrix[i] = default_non_intra_matrix[i];
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}
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/* rate control init */
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rate_control_init(s);
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s->picture_number = 0;
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s->fake_picture_number = 0;
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/* motion detector init */
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s->f_code = 1;
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return 0;
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}
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int MPV_encode_end(AVCodecContext *avctx)
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{
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MpegEncContext *s = avctx->priv_data;
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#ifdef STATS
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print_stats();
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#endif
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MPV_common_end(s);
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if (s->out_format == FMT_MJPEG)
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mjpeg_close(s);
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return 0;
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}
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|
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/* draw the edges of width 'w' of an image of size width, height */
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static void draw_edges_c(UINT8 *buf, int wrap, int width, int height, int w)
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{
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UINT8 *ptr, *last_line;
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int i;
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last_line = buf + (height - 1) * wrap;
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for(i=0;i<w;i++) {
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/* top and bottom */
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memcpy(buf - (i + 1) * wrap, buf, width);
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memcpy(last_line + (i + 1) * wrap, last_line, width);
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}
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/* left and right */
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ptr = buf;
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for(i=0;i<height;i++) {
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memset(ptr - w, ptr[0], w);
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memset(ptr + width, ptr[width-1], w);
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ptr += wrap;
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}
|
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/* corners */
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for(i=0;i<w;i++) {
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memset(buf - (i + 1) * wrap - w, buf[0], w); /* top left */
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memset(buf - (i + 1) * wrap + width, buf[width-1], w); /* top right */
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memset(last_line + (i + 1) * wrap - w, last_line[0], w); /* top left */
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memset(last_line + (i + 1) * wrap + width, last_line[width-1], w); /* top right */
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}
|
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}
|
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|
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/* generic function for encode/decode called before a frame is coded/decoded */
|
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void MPV_frame_start(MpegEncContext *s)
|
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{
|
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int i;
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UINT8 *tmp;
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|
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s->mb_skiped = 0;
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if (s->pict_type == B_TYPE) {
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for(i=0;i<3;i++) {
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s->current_picture[i] = s->aux_picture[i];
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}
|
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} else {
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for(i=0;i<3;i++) {
|
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/* swap next and last */
|
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tmp = s->last_picture[i];
|
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s->last_picture[i] = s->next_picture[i];
|
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s->next_picture[i] = tmp;
|
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s->current_picture[i] = tmp;
|
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}
|
|
}
|
|
}
|
|
|
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/* generic function for encode/decode called after a frame has been coded/decoded */
|
|
void MPV_frame_end(MpegEncContext *s)
|
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{
|
|
/* draw edge for correct motion prediction if outside */
|
|
if (s->pict_type != B_TYPE && !s->intra_only) {
|
|
if(s->avctx==NULL || s->avctx->codec->id!=CODEC_ID_MPEG4){
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draw_edges(s->current_picture[0], s->linesize, s->mb_width*16, s->mb_height*16, EDGE_WIDTH);
|
|
draw_edges(s->current_picture[1], s->linesize/2, s->mb_width*8, s->mb_height*8, EDGE_WIDTH/2);
|
|
draw_edges(s->current_picture[2], s->linesize/2, s->mb_width*8, s->mb_height*8, EDGE_WIDTH/2);
|
|
}else{
|
|
/* OpenDivx, but i dunno how to distinguish it from mpeg4 */
|
|
draw_edges(s->current_picture[0], s->linesize, s->width, s->height, EDGE_WIDTH);
|
|
draw_edges(s->current_picture[1], s->linesize/2, s->width/2, s->height/2, EDGE_WIDTH/2);
|
|
draw_edges(s->current_picture[2], s->linesize/2, s->width/2, s->height/2, EDGE_WIDTH/2);
|
|
}
|
|
}
|
|
emms_c();
|
|
}
|
|
|
|
int MPV_encode_picture(AVCodecContext *avctx,
|
|
unsigned char *buf, int buf_size, void *data)
|
|
{
|
|
MpegEncContext *s = avctx->priv_data;
|
|
AVPicture *pict = data;
|
|
int i, j;
|
|
|
|
if (s->fixed_qscale)
|
|
s->qscale = avctx->quality;
|
|
|
|
init_put_bits(&s->pb, buf, buf_size, NULL, NULL);
|
|
|
|
if (!s->intra_only) {
|
|
/* first picture of GOP is intra */
|
|
if ((s->picture_number % s->gop_size) == 0)
|
|
s->pict_type = I_TYPE;
|
|
else
|
|
s->pict_type = P_TYPE;
|
|
} else {
|
|
s->pict_type = I_TYPE;
|
|
}
|
|
avctx->key_frame = (s->pict_type == I_TYPE);
|
|
|
|
MPV_frame_start(s);
|
|
|
|
for(i=0;i<3;i++) {
|
|
UINT8 *src = pict->data[i];
|
|
UINT8 *dest = s->current_picture[i];
|
|
int src_wrap = pict->linesize[i];
|
|
int dest_wrap = s->linesize;
|
|
int w = s->width;
|
|
int h = s->height;
|
|
|
|
if (i >= 1) {
|
|
dest_wrap >>= 1;
|
|
w >>= 1;
|
|
h >>= 1;
|
|
}
|
|
|
|
if(dest_wrap==src_wrap){
|
|
s->new_picture[i] = pict->data[i];
|
|
} else {
|
|
for(j=0;j<h;j++) {
|
|
memcpy(dest, src, w);
|
|
dest += dest_wrap;
|
|
src += src_wrap;
|
|
}
|
|
s->new_picture[i] = s->current_picture[i];
|
|
}
|
|
}
|
|
|
|
encode_picture(s, s->picture_number);
|
|
|
|
MPV_frame_end(s);
|
|
s->picture_number++;
|
|
|
|
if (s->out_format == FMT_MJPEG)
|
|
mjpeg_picture_trailer(s);
|
|
|
|
flush_put_bits(&s->pb);
|
|
s->total_bits += (s->pb.buf_ptr - s->pb.buf) * 8;
|
|
avctx->quality = s->qscale;
|
|
return s->pb.buf_ptr - s->pb.buf;
|
|
}
|
|
|
|
static inline int clip(int a, int amin, int amax)
|
|
{
|
|
if (a < amin)
|
|
return amin;
|
|
else if (a > amax)
|
|
return amax;
|
|
else
|
|
return a;
|
|
}
|
|
|
|
/* apply one mpeg motion vector to the three components */
|
|
static inline void mpeg_motion(MpegEncContext *s,
|
|
UINT8 *dest_y, UINT8 *dest_cb, UINT8 *dest_cr,
|
|
int dest_offset,
|
|
UINT8 **ref_picture, int src_offset,
|
|
int field_based, op_pixels_func *pix_op,
|
|
int motion_x, int motion_y, int h)
|
|
{
|
|
UINT8 *ptr;
|
|
int dxy, offset, mx, my, src_x, src_y, height, linesize;
|
|
|
|
dxy = ((motion_y & 1) << 1) | (motion_x & 1);
|
|
src_x = s->mb_x * 16 + (motion_x >> 1);
|
|
src_y = s->mb_y * (16 >> field_based) + (motion_y >> 1);
|
|
|
|
/* WARNING: do no forget half pels */
|
|
height = s->height >> field_based;
|
|
src_x = clip(src_x, -16, s->width);
|
|
if (src_x == s->width)
|
|
dxy &= ~1;
|
|
src_y = clip(src_y, -16, height);
|
|
if (src_y == height)
|
|
dxy &= ~2;
|
|
linesize = s->linesize << field_based;
|
|
ptr = ref_picture[0] + (src_y * linesize) + (src_x) + src_offset;
|
|
dest_y += dest_offset;
|
|
pix_op[dxy](dest_y, ptr, linesize, h);
|
|
pix_op[dxy](dest_y + 8, ptr + 8, linesize, h);
|
|
|
|
if (s->out_format == FMT_H263) {
|
|
dxy = 0;
|
|
if ((motion_x & 3) != 0)
|
|
dxy |= 1;
|
|
if ((motion_y & 3) != 0)
|
|
dxy |= 2;
|
|
mx = motion_x >> 2;
|
|
my = motion_y >> 2;
|
|
} else {
|
|
mx = motion_x / 2;
|
|
my = motion_y / 2;
|
|
dxy = ((my & 1) << 1) | (mx & 1);
|
|
mx >>= 1;
|
|
my >>= 1;
|
|
}
|
|
|
|
src_x = s->mb_x * 8 + mx;
|
|
src_y = s->mb_y * (8 >> field_based) + my;
|
|
src_x = clip(src_x, -8, s->width >> 1);
|
|
if (src_x == (s->width >> 1))
|
|
dxy &= ~1;
|
|
src_y = clip(src_y, -8, height >> 1);
|
|
if (src_y == (height >> 1))
|
|
dxy &= ~2;
|
|
|
|
offset = (src_y * (linesize >> 1)) + src_x + (src_offset >> 1);
|
|
ptr = ref_picture[1] + offset;
|
|
pix_op[dxy](dest_cb + (dest_offset >> 1), ptr, linesize >> 1, h >> 1);
|
|
ptr = ref_picture[2] + offset;
|
|
pix_op[dxy](dest_cr + (dest_offset >> 1), ptr, linesize >> 1, h >> 1);
|
|
}
|
|
|
|
static inline void MPV_motion(MpegEncContext *s,
|
|
UINT8 *dest_y, UINT8 *dest_cb, UINT8 *dest_cr,
|
|
int dir, UINT8 **ref_picture,
|
|
op_pixels_func *pix_op)
|
|
{
|
|
int dxy, offset, mx, my, src_x, src_y, motion_x, motion_y;
|
|
int mb_x, mb_y, i;
|
|
UINT8 *ptr, *dest;
|
|
|
|
mb_x = s->mb_x;
|
|
mb_y = s->mb_y;
|
|
|
|
switch(s->mv_type) {
|
|
case MV_TYPE_16X16:
|
|
mpeg_motion(s, dest_y, dest_cb, dest_cr, 0,
|
|
ref_picture, 0,
|
|
0, pix_op,
|
|
s->mv[dir][0][0], s->mv[dir][0][1], 16);
|
|
break;
|
|
case MV_TYPE_8X8:
|
|
for(i=0;i<4;i++) {
|
|
motion_x = s->mv[dir][i][0];
|
|
motion_y = s->mv[dir][i][1];
|
|
|
|
dxy = ((motion_y & 1) << 1) | (motion_x & 1);
|
|
src_x = mb_x * 16 + (motion_x >> 1) + (i & 1) * 8;
|
|
src_y = mb_y * 16 + (motion_y >> 1) + ((i >> 1) & 1) * 8;
|
|
|
|
/* WARNING: do no forget half pels */
|
|
src_x = clip(src_x, -16, s->width);
|
|
if (src_x == s->width)
|
|
dxy &= ~1;
|
|
src_y = clip(src_y, -16, s->height);
|
|
if (src_y == s->height)
|
|
dxy &= ~2;
|
|
|
|
ptr = ref_picture[0] + (src_y * s->linesize) + (src_x);
|
|
dest = dest_y + ((i & 1) * 8) + (i >> 1) * 8 * s->linesize;
|
|
pix_op[dxy](dest, ptr, s->linesize, 8);
|
|
}
|
|
/* In case of 8X8, we construct a single chroma motion vector
|
|
with a special rounding */
|
|
mx = 0;
|
|
my = 0;
|
|
for(i=0;i<4;i++) {
|
|
mx += s->mv[dir][i][0];
|
|
my += s->mv[dir][i][1];
|
|
}
|
|
if (mx >= 0)
|
|
mx = (h263_chroma_roundtab[mx & 0xf] + ((mx >> 3) & ~1));
|
|
else {
|
|
mx = -mx;
|
|
mx = -(h263_chroma_roundtab[mx & 0xf] + ((mx >> 3) & ~1));
|
|
}
|
|
if (my >= 0)
|
|
my = (h263_chroma_roundtab[my & 0xf] + ((my >> 3) & ~1));
|
|
else {
|
|
my = -my;
|
|
my = -(h263_chroma_roundtab[my & 0xf] + ((my >> 3) & ~1));
|
|
}
|
|
dxy = ((my & 1) << 1) | (mx & 1);
|
|
mx >>= 1;
|
|
my >>= 1;
|
|
|
|
src_x = mb_x * 8 + mx;
|
|
src_y = mb_y * 8 + my;
|
|
src_x = clip(src_x, -8, s->width/2);
|
|
if (src_x == s->width/2)
|
|
dxy &= ~1;
|
|
src_y = clip(src_y, -8, s->height/2);
|
|
if (src_y == s->height/2)
|
|
dxy &= ~2;
|
|
|
|
offset = (src_y * (s->linesize >> 1)) + src_x;
|
|
ptr = ref_picture[1] + offset;
|
|
pix_op[dxy](dest_cb, ptr, s->linesize >> 1, 8);
|
|
ptr = ref_picture[2] + offset;
|
|
pix_op[dxy](dest_cr, ptr, s->linesize >> 1, 8);
|
|
break;
|
|
case MV_TYPE_FIELD:
|
|
if (s->picture_structure == PICT_FRAME) {
|
|
/* top field */
|
|
mpeg_motion(s, dest_y, dest_cb, dest_cr, 0,
|
|
ref_picture, s->field_select[dir][0] ? s->linesize : 0,
|
|
1, pix_op,
|
|
s->mv[dir][0][0], s->mv[dir][0][1], 8);
|
|
/* bottom field */
|
|
mpeg_motion(s, dest_y, dest_cb, dest_cr, s->linesize,
|
|
ref_picture, s->field_select[dir][1] ? s->linesize : 0,
|
|
1, pix_op,
|
|
s->mv[dir][1][0], s->mv[dir][1][1], 8);
|
|
} else {
|
|
|
|
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
/* put block[] to dest[] */
|
|
static inline void put_dct(MpegEncContext *s,
|
|
DCTELEM *block, int i, UINT8 *dest, int line_size)
|
|
{
|
|
if (!s->mpeg2)
|
|
s->dct_unquantize(s, block, i, s->qscale);
|
|
ff_idct (block);
|
|
put_pixels_clamped(block, dest, line_size);
|
|
}
|
|
|
|
/* add block[] to dest[] */
|
|
static inline void add_dct(MpegEncContext *s,
|
|
DCTELEM *block, int i, UINT8 *dest, int line_size)
|
|
{
|
|
if (s->block_last_index[i] >= 0) {
|
|
if (!s->mpeg2)
|
|
if(s->encoding || (!s->h263_msmpeg4))
|
|
s->dct_unquantize(s, block, i, s->qscale);
|
|
ff_idct (block);
|
|
add_pixels_clamped(block, dest, line_size);
|
|
}
|
|
}
|
|
|
|
/* generic function called after a macroblock has been parsed by the
|
|
decoder or after it has been encoded by the encoder.
|
|
|
|
Important variables used:
|
|
s->mb_intra : true if intra macroblock
|
|
s->mv_dir : motion vector direction
|
|
s->mv_type : motion vector type
|
|
s->mv : motion vector
|
|
s->interlaced_dct : true if interlaced dct used (mpeg2)
|
|
*/
|
|
void MPV_decode_mb(MpegEncContext *s, DCTELEM block[6][64])
|
|
{
|
|
int mb_x, mb_y, motion_x, motion_y;
|
|
int dct_linesize, dct_offset;
|
|
op_pixels_func *op_pix;
|
|
|
|
mb_x = s->mb_x;
|
|
mb_y = s->mb_y;
|
|
|
|
#ifdef FF_POSTPROCESS
|
|
quant_store[mb_y][mb_x]=s->qscale;
|
|
//printf("[%02d][%02d] %d\n",mb_x,mb_y,s->qscale);
|
|
#endif
|
|
|
|
/* update DC predictors for P macroblocks */
|
|
if (!s->mb_intra) {
|
|
if (s->h263_pred) {
|
|
if(s->mbintra_table[mb_x + mb_y*s->mb_width])
|
|
{
|
|
int wrap, x, y, v;
|
|
s->mbintra_table[mb_x + mb_y*s->mb_width]=0;
|
|
|
|
wrap = 2 * s->mb_width + 2;
|
|
v = 1024;
|
|
x = 2 * mb_x + 1;
|
|
y = 2 * mb_y + 1;
|
|
|
|
s->dc_val[0][(x) + (y) * wrap] = v;
|
|
s->dc_val[0][(x + 1) + (y) * wrap] = v;
|
|
s->dc_val[0][(x) + (y + 1) * wrap] = v;
|
|
s->dc_val[0][(x + 1) + (y + 1) * wrap] = v;
|
|
/* ac pred */
|
|
memset(s->ac_val[0][(x) + (y) * wrap], 0, 16 * sizeof(INT16));
|
|
memset(s->ac_val[0][(x + 1) + (y) * wrap], 0, 16 * sizeof(INT16));
|
|
memset(s->ac_val[0][(x) + (y + 1) * wrap], 0, 16 * sizeof(INT16));
|
|
memset(s->ac_val[0][(x + 1) + (y + 1) * wrap], 0, 16 * sizeof(INT16));
|
|
if (s->h263_msmpeg4) {
|
|
s->coded_block[(x) + (y) * wrap] = 0;
|
|
s->coded_block[(x + 1) + (y) * wrap] = 0;
|
|
s->coded_block[(x) + (y + 1) * wrap] = 0;
|
|
s->coded_block[(x + 1) + (y + 1) * wrap] = 0;
|
|
}
|
|
/* chroma */
|
|
wrap = s->mb_width + 2;
|
|
x = mb_x + 1;
|
|
y = mb_y + 1;
|
|
s->dc_val[1][(x) + (y) * wrap] = v;
|
|
s->dc_val[2][(x) + (y) * wrap] = v;
|
|
/* ac pred */
|
|
memset(s->ac_val[1][(x) + (y) * wrap], 0, 16 * sizeof(INT16));
|
|
memset(s->ac_val[2][(x) + (y) * wrap], 0, 16 * sizeof(INT16));
|
|
}
|
|
} else {
|
|
s->last_dc[0] = 128 << s->intra_dc_precision;
|
|
s->last_dc[1] = 128 << s->intra_dc_precision;
|
|
s->last_dc[2] = 128 << s->intra_dc_precision;
|
|
}
|
|
}
|
|
else if (s->h263_pred)
|
|
s->mbintra_table[mb_x + mb_y*s->mb_width]=1;
|
|
|
|
/* update motion predictor */
|
|
if (s->out_format == FMT_H263) {
|
|
int x, y, wrap;
|
|
|
|
x = 2 * mb_x + 1;
|
|
y = 2 * mb_y + 1;
|
|
wrap = 2 * s->mb_width + 2;
|
|
if (s->mb_intra) {
|
|
motion_x = 0;
|
|
motion_y = 0;
|
|
goto motion_init;
|
|
} else if (s->mv_type == MV_TYPE_16X16) {
|
|
motion_x = s->mv[0][0][0];
|
|
motion_y = s->mv[0][0][1];
|
|
motion_init:
|
|
/* no update if 8X8 because it has been done during parsing */
|
|
s->motion_val[(x) + (y) * wrap][0] = motion_x;
|
|
s->motion_val[(x) + (y) * wrap][1] = motion_y;
|
|
s->motion_val[(x + 1) + (y) * wrap][0] = motion_x;
|
|
s->motion_val[(x + 1) + (y) * wrap][1] = motion_y;
|
|
s->motion_val[(x) + (y + 1) * wrap][0] = motion_x;
|
|
s->motion_val[(x) + (y + 1) * wrap][1] = motion_y;
|
|
s->motion_val[(x + 1) + (y + 1) * wrap][0] = motion_x;
|
|
s->motion_val[(x + 1) + (y + 1) * wrap][1] = motion_y;
|
|
}
|
|
}
|
|
|
|
if (!s->intra_only) {
|
|
UINT8 *dest_y, *dest_cb, *dest_cr;
|
|
UINT8 *mbskip_ptr;
|
|
|
|
/* avoid copy if macroblock skipped in last frame too */
|
|
if (!s->encoding && s->pict_type != B_TYPE) {
|
|
mbskip_ptr = &s->mbskip_table[s->mb_y * s->mb_width + s->mb_x];
|
|
if (s->mb_skiped) {
|
|
s->mb_skiped = 0;
|
|
/* if previous was skipped too, then nothing to do ! */
|
|
if (*mbskip_ptr != 0)
|
|
goto the_end;
|
|
*mbskip_ptr = 1; /* indicate that this time we skiped it */
|
|
} else {
|
|
*mbskip_ptr = 0; /* not skipped */
|
|
}
|
|
}
|
|
|
|
dest_y = s->current_picture[0] + (mb_y * 16 * s->linesize) + mb_x * 16;
|
|
dest_cb = s->current_picture[1] + (mb_y * 8 * (s->linesize >> 1)) + mb_x * 8;
|
|
dest_cr = s->current_picture[2] + (mb_y * 8 * (s->linesize >> 1)) + mb_x * 8;
|
|
|
|
if (s->interlaced_dct) {
|
|
dct_linesize = s->linesize * 2;
|
|
dct_offset = s->linesize;
|
|
} else {
|
|
dct_linesize = s->linesize;
|
|
dct_offset = s->linesize * 8;
|
|
}
|
|
|
|
if (!s->mb_intra) {
|
|
/* motion handling */
|
|
if (!s->no_rounding)
|
|
op_pix = put_pixels_tab;
|
|
else
|
|
op_pix = put_no_rnd_pixels_tab;
|
|
|
|
if (s->mv_dir & MV_DIR_FORWARD) {
|
|
MPV_motion(s, dest_y, dest_cb, dest_cr, 0, s->last_picture, op_pix);
|
|
if (!s->no_rounding)
|
|
op_pix = avg_pixels_tab;
|
|
else
|
|
op_pix = avg_no_rnd_pixels_tab;
|
|
}
|
|
if (s->mv_dir & MV_DIR_BACKWARD) {
|
|
MPV_motion(s, dest_y, dest_cb, dest_cr, 1, s->next_picture, op_pix);
|
|
}
|
|
|
|
/* add dct residue */
|
|
add_dct(s, block[0], 0, dest_y, dct_linesize);
|
|
add_dct(s, block[1], 1, dest_y + 8, dct_linesize);
|
|
add_dct(s, block[2], 2, dest_y + dct_offset, dct_linesize);
|
|
add_dct(s, block[3], 3, dest_y + dct_offset + 8, dct_linesize);
|
|
|
|
add_dct(s, block[4], 4, dest_cb, s->linesize >> 1);
|
|
add_dct(s, block[5], 5, dest_cr, s->linesize >> 1);
|
|
} else {
|
|
/* dct only in intra block */
|
|
put_dct(s, block[0], 0, dest_y, dct_linesize);
|
|
put_dct(s, block[1], 1, dest_y + 8, dct_linesize);
|
|
put_dct(s, block[2], 2, dest_y + dct_offset, dct_linesize);
|
|
put_dct(s, block[3], 3, dest_y + dct_offset + 8, dct_linesize);
|
|
|
|
put_dct(s, block[4], 4, dest_cb, s->linesize >> 1);
|
|
put_dct(s, block[5], 5, dest_cr, s->linesize >> 1);
|
|
}
|
|
}
|
|
the_end:
|
|
emms_c();
|
|
}
|
|
|
|
static void encode_picture(MpegEncContext *s, int picture_number)
|
|
{
|
|
int mb_x, mb_y, wrap, last_gob, pdif = 0;
|
|
UINT8 *ptr;
|
|
int i, motion_x, motion_y;
|
|
|
|
s->picture_number = picture_number;
|
|
if (!s->fixed_qscale)
|
|
s->qscale = rate_estimate_qscale(s);
|
|
|
|
/* precompute matrix */
|
|
if (s->out_format == FMT_MJPEG) {
|
|
/* for mjpeg, we do include qscale in the matrix */
|
|
s->intra_matrix[0] = default_intra_matrix[0];
|
|
for(i=1;i<64;i++)
|
|
s->intra_matrix[i] = (default_intra_matrix[i] * s->qscale) >> 3;
|
|
convert_matrix(s->q_intra_matrix, s->q_intra_matrix16, s->intra_matrix, 8);
|
|
} else {
|
|
convert_matrix(s->q_intra_matrix, s->q_intra_matrix16, s->intra_matrix, s->qscale);
|
|
convert_matrix(s->q_non_intra_matrix, s->q_non_intra_matrix16, s->non_intra_matrix, s->qscale);
|
|
}
|
|
|
|
switch(s->out_format) {
|
|
case FMT_MJPEG:
|
|
mjpeg_picture_header(s);
|
|
break;
|
|
case FMT_H263:
|
|
if (s->h263_msmpeg4)
|
|
msmpeg4_encode_picture_header(s, picture_number);
|
|
else if (s->h263_pred)
|
|
mpeg4_encode_picture_header(s, picture_number);
|
|
else if (s->h263_rv10)
|
|
rv10_encode_picture_header(s, picture_number);
|
|
else
|
|
h263_encode_picture_header(s, picture_number);
|
|
break;
|
|
case FMT_MPEG1:
|
|
mpeg1_encode_picture_header(s, picture_number);
|
|
break;
|
|
}
|
|
|
|
/* init last dc values */
|
|
/* note: quant matrix value (8) is implied here */
|
|
s->last_dc[0] = 128;
|
|
s->last_dc[1] = 128;
|
|
s->last_dc[2] = 128;
|
|
s->mb_incr = 1;
|
|
s->last_mv[0][0][0] = 0;
|
|
s->last_mv[0][0][1] = 0;
|
|
s->mv_type = MV_TYPE_16X16;
|
|
s->mv_dir = MV_DIR_FORWARD;
|
|
|
|
/* Get the GOB height based on picture height */
|
|
if (s->out_format == FMT_H263 && !s->h263_pred && !s->h263_msmpeg4) {
|
|
if (s->height <= 400)
|
|
s->gob_index = 1;
|
|
else if (s->height <= 800)
|
|
s->gob_index = 2;
|
|
else
|
|
s->gob_index = 4;
|
|
}
|
|
|
|
for(mb_y=0; mb_y < s->mb_height; mb_y++) {
|
|
/* Put GOB header based on RTP MTU */
|
|
/* TODO: Put all this stuff in a separate generic function */
|
|
if (s->rtp_mode) {
|
|
if (!mb_y) {
|
|
s->ptr_lastgob = s->pb.buf;
|
|
s->ptr_last_mb_line = s->pb.buf;
|
|
} else if (s->out_format == FMT_H263 && !s->h263_pred && !s->h263_msmpeg4 && !(mb_y % s->gob_index)) {
|
|
last_gob = h263_encode_gob_header(s, mb_y);
|
|
if (last_gob) {
|
|
s->first_gob_line = 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
for(mb_x=0; mb_x < s->mb_width; mb_x++) {
|
|
s->mb_x = mb_x;
|
|
s->mb_y = mb_y;
|
|
|
|
/* compute motion vector and macro block type (intra or non intra) */
|
|
motion_x = 0;
|
|
motion_y = 0;
|
|
if (s->pict_type == P_TYPE) {
|
|
s->mb_intra = estimate_motion(s, mb_x, mb_y,
|
|
&motion_x,
|
|
&motion_y);
|
|
} else {
|
|
s->mb_intra = 1;
|
|
}
|
|
/* Store MB type and MV */
|
|
s->mb_type[mb_y * s->mb_width + mb_x] = s->mb_intra;
|
|
s->mv_table[0][mb_y * s->mb_width + mb_x] = motion_x;
|
|
s->mv_table[1][mb_y * s->mb_width + mb_x] = motion_y;
|
|
}
|
|
|
|
for(mb_x=0; mb_x < s->mb_width; mb_x++) {
|
|
|
|
s->mb_x = mb_x;
|
|
s->mb_y = mb_y;
|
|
#if 0
|
|
/* compute motion vector and macro block type (intra or non intra) */
|
|
motion_x = 0;
|
|
motion_y = 0;
|
|
if (s->pict_type == P_TYPE) {
|
|
s->mb_intra = estimate_motion(s, mb_x, mb_y,
|
|
&motion_x,
|
|
&motion_y);
|
|
} else {
|
|
s->mb_intra = 1;
|
|
}
|
|
#endif
|
|
|
|
s->mb_intra = s->mb_type[mb_y * s->mb_width + mb_x];
|
|
motion_x = s->mv_table[0][mb_y * s->mb_width + mb_x];
|
|
motion_y = s->mv_table[1][mb_y * s->mb_width + mb_x];
|
|
|
|
/* get the pixels */
|
|
wrap = s->linesize;
|
|
ptr = s->new_picture[0] + (mb_y * 16 * wrap) + mb_x * 16;
|
|
get_pixels(s->block[0], ptr, wrap);
|
|
get_pixels(s->block[1], ptr + 8, wrap);
|
|
get_pixels(s->block[2], ptr + 8 * wrap, wrap);
|
|
get_pixels(s->block[3], ptr + 8 * wrap + 8, wrap);
|
|
wrap = s->linesize >> 1;
|
|
ptr = s->new_picture[1] + (mb_y * 8 * wrap) + mb_x * 8;
|
|
get_pixels(s->block[4], ptr, wrap);
|
|
|
|
wrap = s->linesize >> 1;
|
|
ptr = s->new_picture[2] + (mb_y * 8 * wrap) + mb_x * 8;
|
|
get_pixels(s->block[5], ptr, wrap);
|
|
|
|
/* subtract previous frame if non intra */
|
|
if (!s->mb_intra) {
|
|
int dxy, offset, mx, my;
|
|
|
|
dxy = ((motion_y & 1) << 1) | (motion_x & 1);
|
|
ptr = s->last_picture[0] +
|
|
((mb_y * 16 + (motion_y >> 1)) * s->linesize) +
|
|
(mb_x * 16 + (motion_x >> 1));
|
|
|
|
sub_pixels_2(s->block[0], ptr, s->linesize, dxy);
|
|
sub_pixels_2(s->block[1], ptr + 8, s->linesize, dxy);
|
|
sub_pixels_2(s->block[2], ptr + s->linesize * 8, s->linesize, dxy);
|
|
sub_pixels_2(s->block[3], ptr + 8 + s->linesize * 8, s->linesize ,dxy);
|
|
|
|
if (s->out_format == FMT_H263) {
|
|
/* special rounding for h263 */
|
|
dxy = 0;
|
|
if ((motion_x & 3) != 0)
|
|
dxy |= 1;
|
|
if ((motion_y & 3) != 0)
|
|
dxy |= 2;
|
|
mx = motion_x >> 2;
|
|
my = motion_y >> 2;
|
|
} else {
|
|
mx = motion_x / 2;
|
|
my = motion_y / 2;
|
|
dxy = ((my & 1) << 1) | (mx & 1);
|
|
mx >>= 1;
|
|
my >>= 1;
|
|
}
|
|
offset = ((mb_y * 8 + my) * (s->linesize >> 1)) + (mb_x * 8 + mx);
|
|
ptr = s->last_picture[1] + offset;
|
|
sub_pixels_2(s->block[4], ptr, s->linesize >> 1, dxy);
|
|
ptr = s->last_picture[2] + offset;
|
|
sub_pixels_2(s->block[5], ptr, s->linesize >> 1, dxy);
|
|
}
|
|
emms_c();
|
|
|
|
/* DCT & quantize */
|
|
if (s->h263_msmpeg4) {
|
|
msmpeg4_dc_scale(s);
|
|
} else if (s->h263_pred) {
|
|
h263_dc_scale(s);
|
|
} else {
|
|
/* default quantization values */
|
|
s->y_dc_scale = 8;
|
|
s->c_dc_scale = 8;
|
|
}
|
|
for(i=0;i<6;i++) {
|
|
s->block_last_index[i] = dct_quantize(s, s->block[i], i, s->qscale);
|
|
}
|
|
|
|
/* huffman encode */
|
|
switch(s->out_format) {
|
|
case FMT_MPEG1:
|
|
mpeg1_encode_mb(s, s->block, motion_x, motion_y);
|
|
break;
|
|
case FMT_H263:
|
|
if (s->h263_msmpeg4)
|
|
msmpeg4_encode_mb(s, s->block, motion_x, motion_y);
|
|
else
|
|
h263_encode_mb(s, s->block, motion_x, motion_y);
|
|
break;
|
|
case FMT_MJPEG:
|
|
mjpeg_encode_mb(s, s->block);
|
|
break;
|
|
}
|
|
|
|
/* decompress blocks so that we keep the state of the decoder */
|
|
s->mv[0][0][0] = motion_x;
|
|
s->mv[0][0][1] = motion_y;
|
|
|
|
MPV_decode_mb(s, s->block);
|
|
}
|
|
/* Obtain average GOB size for RTP */
|
|
if (s->rtp_mode) {
|
|
if (!mb_y)
|
|
s->mb_line_avgsize = s->pb.buf_ptr - s->ptr_last_mb_line;
|
|
else if (!(mb_y % s->gob_index)) {
|
|
s->mb_line_avgsize = (s->mb_line_avgsize + s->pb.buf_ptr - s->ptr_last_mb_line) >> 1;
|
|
s->ptr_last_mb_line = s->pb.buf_ptr;
|
|
}
|
|
//fprintf(stderr, "\nMB line: %d\tSize: %u\tAvg. Size: %u", s->mb_y,
|
|
// (s->pb.buf_ptr - s->ptr_last_mb_line), s->mb_line_avgsize);
|
|
s->first_gob_line = 0;
|
|
}
|
|
}
|
|
|
|
if (s->h263_msmpeg4)
|
|
msmpeg4_encode_ext_header(s);
|
|
|
|
//if (s->gob_number)
|
|
// fprintf(stderr,"\nNumber of GOB: %d", s->gob_number);
|
|
|
|
/* Send the last GOB if RTP */
|
|
if (s->rtp_mode) {
|
|
flush_put_bits(&s->pb);
|
|
pdif = s->pb.buf_ptr - s->ptr_lastgob;
|
|
/* Call the RTP callback to send the last GOB */
|
|
if (s->rtp_callback)
|
|
s->rtp_callback(s->ptr_lastgob, pdif, s->gob_number);
|
|
s->ptr_lastgob = s->pb.buf_ptr;
|
|
//fprintf(stderr,"\nGOB: %2d size: %d (last)", s->gob_number, pdif);
|
|
}
|
|
|
|
}
|
|
|
|
static int dct_quantize_c(MpegEncContext *s,
|
|
DCTELEM *block, int n,
|
|
int qscale)
|
|
{
|
|
int i, j, level, last_non_zero, q;
|
|
const int *qmat;
|
|
int minLevel, maxLevel;
|
|
|
|
if(s->avctx!=NULL && s->avctx->codec->id==CODEC_ID_MPEG4){
|
|
/* mpeg4 */
|
|
minLevel= -2048;
|
|
maxLevel= 2047;
|
|
}else if(s->out_format==FMT_MPEG1){
|
|
/* mpeg1 */
|
|
minLevel= -255;
|
|
maxLevel= 255;
|
|
}else if(s->out_format==FMT_MJPEG){
|
|
/* (m)jpeg */
|
|
minLevel= -1023;
|
|
maxLevel= 1023;
|
|
}else{
|
|
/* h263 / msmpeg4 */
|
|
minLevel= -128;
|
|
maxLevel= 127;
|
|
}
|
|
|
|
av_fdct (block);
|
|
|
|
/* we need this permutation so that we correct the IDCT
|
|
permutation. will be moved into DCT code */
|
|
block_permute(block);
|
|
|
|
if (s->mb_intra) {
|
|
if (n < 4)
|
|
q = s->y_dc_scale;
|
|
else
|
|
q = s->c_dc_scale;
|
|
q = q << 3;
|
|
|
|
/* note: block[0] is assumed to be positive */
|
|
block[0] = (block[0] + (q >> 1)) / q;
|
|
i = 1;
|
|
last_non_zero = 0;
|
|
if (s->out_format == FMT_H263) {
|
|
qmat = s->q_non_intra_matrix;
|
|
} else {
|
|
qmat = s->q_intra_matrix;
|
|
}
|
|
} else {
|
|
i = 0;
|
|
last_non_zero = -1;
|
|
qmat = s->q_non_intra_matrix;
|
|
}
|
|
|
|
for(;i<64;i++) {
|
|
j = zigzag_direct[i];
|
|
level = block[j];
|
|
level = level * qmat[j];
|
|
#ifdef PARANOID
|
|
{
|
|
static int count = 0;
|
|
int level1, level2, qmat1;
|
|
double val;
|
|
if (qmat == s->q_non_intra_matrix) {
|
|
qmat1 = default_non_intra_matrix[j] * s->qscale;
|
|
} else {
|
|
qmat1 = default_intra_matrix[j] * s->qscale;
|
|
}
|
|
if (av_fdct != jpeg_fdct_ifast)
|
|
val = ((double)block[j] * 8.0) / (double)qmat1;
|
|
else
|
|
val = ((double)block[j] * 8.0 * 2048.0) /
|
|
((double)qmat1 * aanscales[j]);
|
|
level1 = (int)val;
|
|
level2 = level / (1 << (QMAT_SHIFT - 3));
|
|
if (level1 != level2) {
|
|
fprintf(stderr, "%d: quant error qlevel=%d wanted=%d level=%d qmat1=%d qmat=%d wantedf=%0.6f\n",
|
|
count, level2, level1, block[j], qmat1, qmat[j],
|
|
val);
|
|
count++;
|
|
}
|
|
|
|
}
|
|
#endif
|
|
/* XXX: slight error for the low range. Test should be equivalent to
|
|
(level <= -(1 << (QMAT_SHIFT - 3)) || level >= (1 <<
|
|
(QMAT_SHIFT - 3)))
|
|
*/
|
|
if (((level << (31 - (QMAT_SHIFT - 3))) >> (31 - (QMAT_SHIFT - 3))) !=
|
|
level) {
|
|
level = level / (1 << (QMAT_SHIFT - 3));
|
|
/* XXX: currently, this code is not optimal. the range should be:
|
|
mpeg1: -255..255
|
|
mpeg2: -2048..2047
|
|
h263: -128..127
|
|
mpeg4: -2048..2047
|
|
*/
|
|
if (level > maxLevel)
|
|
level = maxLevel;
|
|
else if (level < minLevel)
|
|
level = minLevel;
|
|
|
|
block[j] = level;
|
|
last_non_zero = i;
|
|
} else {
|
|
block[j] = 0;
|
|
}
|
|
}
|
|
return last_non_zero;
|
|
}
|
|
|
|
static void dct_unquantize_mpeg1_c(MpegEncContext *s,
|
|
DCTELEM *block, int n, int qscale)
|
|
{
|
|
int i, level, nCoeffs;
|
|
const UINT16 *quant_matrix;
|
|
|
|
if(s->alternate_scan) nCoeffs= 64;
|
|
else nCoeffs= s->block_last_index[n]+1;
|
|
|
|
if (s->mb_intra) {
|
|
if (n < 4)
|
|
block[0] = block[0] * s->y_dc_scale;
|
|
else
|
|
block[0] = block[0] * s->c_dc_scale;
|
|
/* XXX: only mpeg1 */
|
|
quant_matrix = s->intra_matrix;
|
|
for(i=1;i<nCoeffs;i++) {
|
|
int j= zigzag_direct[i];
|
|
level = block[j];
|
|
if (level) {
|
|
if (level < 0) {
|
|
level = -level;
|
|
level = (int)(level * qscale * quant_matrix[j]) >> 3;
|
|
level = (level - 1) | 1;
|
|
level = -level;
|
|
} else {
|
|
level = (int)(level * qscale * quant_matrix[j]) >> 3;
|
|
level = (level - 1) | 1;
|
|
}
|
|
#ifdef PARANOID
|
|
if (level < -2048 || level > 2047)
|
|
fprintf(stderr, "unquant error %d %d\n", i, level);
|
|
#endif
|
|
block[j] = level;
|
|
}
|
|
}
|
|
} else {
|
|
i = 0;
|
|
quant_matrix = s->non_intra_matrix;
|
|
for(;i<nCoeffs;i++) {
|
|
int j= zigzag_direct[i];
|
|
level = block[j];
|
|
if (level) {
|
|
if (level < 0) {
|
|
level = -level;
|
|
level = (((level << 1) + 1) * qscale *
|
|
((int) (quant_matrix[j]))) >> 4;
|
|
level = (level - 1) | 1;
|
|
level = -level;
|
|
} else {
|
|
level = (((level << 1) + 1) * qscale *
|
|
((int) (quant_matrix[j]))) >> 4;
|
|
level = (level - 1) | 1;
|
|
}
|
|
#ifdef PARANOID
|
|
if (level < -2048 || level > 2047)
|
|
fprintf(stderr, "unquant error %d %d\n", i, level);
|
|
#endif
|
|
block[j] = level;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void dct_unquantize_h263_c(MpegEncContext *s,
|
|
DCTELEM *block, int n, int qscale)
|
|
{
|
|
int i, level, qmul, qadd;
|
|
int nCoeffs;
|
|
|
|
if (s->mb_intra) {
|
|
if (n < 4)
|
|
block[0] = block[0] * s->y_dc_scale;
|
|
else
|
|
block[0] = block[0] * s->c_dc_scale;
|
|
i = 1;
|
|
nCoeffs= 64; //does not allways use zigzag table
|
|
} else {
|
|
i = 0;
|
|
nCoeffs= zigzag_end[ s->block_last_index[n] ];
|
|
}
|
|
|
|
qmul = s->qscale << 1;
|
|
qadd = (s->qscale - 1) | 1;
|
|
|
|
for(;i<nCoeffs;i++) {
|
|
level = block[i];
|
|
if (level) {
|
|
if (level < 0) {
|
|
level = level * qmul - qadd;
|
|
} else {
|
|
level = level * qmul + qadd;
|
|
}
|
|
#ifdef PARANOID
|
|
if (level < -2048 || level > 2047)
|
|
fprintf(stderr, "unquant error %d %d\n", i, level);
|
|
#endif
|
|
block[i] = level;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* rate control */
|
|
|
|
/* an I frame is I_FRAME_SIZE_RATIO bigger than a P frame */
|
|
#define I_FRAME_SIZE_RATIO 3.0
|
|
#define QSCALE_K 20
|
|
|
|
static void rate_control_init(MpegEncContext *s)
|
|
{
|
|
s->wanted_bits = 0;
|
|
|
|
if (s->intra_only) {
|
|
s->I_frame_bits = ((INT64)s->bit_rate * FRAME_RATE_BASE) / s->frame_rate;
|
|
s->P_frame_bits = s->I_frame_bits;
|
|
} else {
|
|
s->P_frame_bits = (int) ((float)(s->gop_size * s->bit_rate) /
|
|
(float)((float)s->frame_rate / FRAME_RATE_BASE * (I_FRAME_SIZE_RATIO + s->gop_size - 1)));
|
|
s->I_frame_bits = (int)(s->P_frame_bits * I_FRAME_SIZE_RATIO);
|
|
}
|
|
|
|
#if defined(DEBUG)
|
|
printf("I_frame_size=%d P_frame_size=%d\n",
|
|
s->I_frame_bits, s->P_frame_bits);
|
|
#endif
|
|
}
|
|
|
|
|
|
/*
|
|
* This heuristic is rather poor, but at least we do not have to
|
|
* change the qscale at every macroblock.
|
|
*/
|
|
static int rate_estimate_qscale(MpegEncContext *s)
|
|
{
|
|
INT64 diff, total_bits = s->total_bits;
|
|
float q;
|
|
int qscale, qmin;
|
|
|
|
if (s->pict_type == I_TYPE) {
|
|
s->wanted_bits += s->I_frame_bits;
|
|
} else {
|
|
s->wanted_bits += s->P_frame_bits;
|
|
}
|
|
diff = s->wanted_bits - total_bits;
|
|
q = 31.0 - (float)diff / (QSCALE_K * s->mb_height * s->mb_width);
|
|
/* adjust for I frame */
|
|
if (s->pict_type == I_TYPE && !s->intra_only) {
|
|
q /= I_FRAME_SIZE_RATIO;
|
|
}
|
|
|
|
/* using a too small Q scale leeds to problems in mpeg1 and h263
|
|
because AC coefficients are clamped to 255 or 127 */
|
|
qmin = 3;
|
|
if (q < qmin)
|
|
q = qmin;
|
|
else if (q > 31)
|
|
q = 31;
|
|
qscale = (int)(q + 0.5);
|
|
#if defined(DEBUG)
|
|
printf("%d: total=%0.0f br=%0.1f diff=%d qest=%0.1f\n",
|
|
s->picture_number,
|
|
(double)total_bits,
|
|
(float)s->frame_rate / FRAME_RATE_BASE *
|
|
total_bits / s->picture_number,
|
|
diff, q);
|
|
#endif
|
|
return qscale;
|
|
}
|
|
|
|
AVCodec mpeg1video_encoder = {
|
|
"mpeg1video",
|
|
CODEC_TYPE_VIDEO,
|
|
CODEC_ID_MPEG1VIDEO,
|
|
sizeof(MpegEncContext),
|
|
MPV_encode_init,
|
|
MPV_encode_picture,
|
|
MPV_encode_end,
|
|
};
|
|
|
|
AVCodec h263_encoder = {
|
|
"h263",
|
|
CODEC_TYPE_VIDEO,
|
|
CODEC_ID_H263,
|
|
sizeof(MpegEncContext),
|
|
MPV_encode_init,
|
|
MPV_encode_picture,
|
|
MPV_encode_end,
|
|
};
|
|
|
|
AVCodec h263p_encoder = {
|
|
"h263p",
|
|
CODEC_TYPE_VIDEO,
|
|
CODEC_ID_H263P,
|
|
sizeof(MpegEncContext),
|
|
MPV_encode_init,
|
|
MPV_encode_picture,
|
|
MPV_encode_end,
|
|
};
|
|
|
|
AVCodec rv10_encoder = {
|
|
"rv10",
|
|
CODEC_TYPE_VIDEO,
|
|
CODEC_ID_RV10,
|
|
sizeof(MpegEncContext),
|
|
MPV_encode_init,
|
|
MPV_encode_picture,
|
|
MPV_encode_end,
|
|
};
|
|
|
|
AVCodec mjpeg_encoder = {
|
|
"mjpeg",
|
|
CODEC_TYPE_VIDEO,
|
|
CODEC_ID_MJPEG,
|
|
sizeof(MpegEncContext),
|
|
MPV_encode_init,
|
|
MPV_encode_picture,
|
|
MPV_encode_end,
|
|
};
|
|
|
|
AVCodec mpeg4_encoder = {
|
|
"mpeg4",
|
|
CODEC_TYPE_VIDEO,
|
|
CODEC_ID_MPEG4,
|
|
sizeof(MpegEncContext),
|
|
MPV_encode_init,
|
|
MPV_encode_picture,
|
|
MPV_encode_end,
|
|
};
|
|
|
|
AVCodec msmpeg4_encoder = {
|
|
"msmpeg4",
|
|
CODEC_TYPE_VIDEO,
|
|
CODEC_ID_MSMPEG4,
|
|
sizeof(MpegEncContext),
|
|
MPV_encode_init,
|
|
MPV_encode_picture,
|
|
MPV_encode_end,
|
|
};
|