ffmpeg / libavcodec / mpegvideo.c @ 2f349de2
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/*
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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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|
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#ifdef USE_FASTMEMCPY
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#include "fastmemcpy.h" |
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#endif
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|
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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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|
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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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|
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#define EDGE_WIDTH 16 |
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|
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/* enable all paranoid tests for rounding, overflows, etc... */
|
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//#define PARANOID
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|
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//#define DEBUG
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|
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/* for jpeg fast DCT */
|
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#define CONST_BITS 14 |
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|
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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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|
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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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|
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/* default motion estimation */
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int motion_estimation_method = ME_LOG;
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|
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extern UINT8 zigzag_end[64]; |
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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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->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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|
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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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|
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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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|
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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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s->avctx = avctx; |
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|
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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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|
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s->fixed_qscale = (avctx->flags & CODEC_FLAG_QSCALE); |
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|
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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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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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|
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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:
|
| 308 |
s->out_format = FMT_H263; |
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s->h263_rv10 = 1;
|
| 310 |
break;
|
| 311 |
case CODEC_ID_MPEG4:
|
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s->out_format = FMT_H263; |
| 313 |
s->h263_pred = 1;
|
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s->unrestricted_mv = 1;
|
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break;
|
| 316 |
case CODEC_ID_MSMPEG4:
|
| 317 |
s->out_format = FMT_H263; |
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s->h263_msmpeg4 = 1;
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s->h263_pred = 1;
|
| 320 |
s->unrestricted_mv = 1;
|
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break;
|
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default:
|
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return -1; |
| 324 |
} |
| 325 |
|
| 326 |
if (s->out_format == FMT_H263)
|
| 327 |
h263_encode_init_vlc(s); |
| 328 |
|
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s->encoding = 1;
|
| 330 |
|
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/* init */
|
| 332 |
if (MPV_common_init(s) < 0) |
| 333 |
return -1; |
| 334 |
|
| 335 |
/* init default q matrix */
|
| 336 |
for(i=0;i<64;i++) { |
| 337 |
s->intra_matrix[i] = default_intra_matrix[i]; |
| 338 |
s->non_intra_matrix[i] = default_non_intra_matrix[i]; |
| 339 |
} |
| 340 |
|
| 341 |
/* rate control init */
|
| 342 |
rate_control_init(s); |
| 343 |
|
| 344 |
s->picture_number = 0;
|
| 345 |
s->fake_picture_number = 0;
|
| 346 |
/* motion detector init */
|
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s->f_code = 1;
|
| 348 |
|
| 349 |
return 0; |
| 350 |
} |
| 351 |
|
| 352 |
int MPV_encode_end(AVCodecContext *avctx)
|
| 353 |
{
|
| 354 |
MpegEncContext *s = avctx->priv_data; |
| 355 |
|
| 356 |
#ifdef STATS
|
| 357 |
print_stats(); |
| 358 |
#endif
|
| 359 |
MPV_common_end(s); |
| 360 |
if (s->out_format == FMT_MJPEG)
|
| 361 |
mjpeg_close(s); |
| 362 |
return 0; |
| 363 |
} |
| 364 |
|
| 365 |
/* draw the edges of width 'w' of an image of size width, height */
|
| 366 |
static void draw_edges_c(UINT8 *buf, int wrap, int width, int height, int w) |
| 367 |
{
|
| 368 |
UINT8 *ptr, *last_line; |
| 369 |
int i;
|
| 370 |
|
| 371 |
last_line = buf + (height - 1) * wrap;
|
| 372 |
for(i=0;i<w;i++) { |
| 373 |
/* top and bottom */
|
| 374 |
memcpy(buf - (i + 1) * wrap, buf, width);
|
| 375 |
memcpy(last_line + (i + 1) * wrap, last_line, width);
|
| 376 |
} |
| 377 |
/* left and right */
|
| 378 |
ptr = buf; |
| 379 |
for(i=0;i<height;i++) { |
| 380 |
memset(ptr - w, ptr[0], w);
|
| 381 |
memset(ptr + width, ptr[width-1], w);
|
| 382 |
ptr += wrap; |
| 383 |
} |
| 384 |
/* corners */
|
| 385 |
for(i=0;i<w;i++) { |
| 386 |
memset(buf - (i + 1) * wrap - w, buf[0], w); /* top left */ |
| 387 |
memset(buf - (i + 1) * wrap + width, buf[width-1], w); /* top right */ |
| 388 |
memset(last_line + (i + 1) * wrap - w, last_line[0], w); /* top left */ |
| 389 |
memset(last_line + (i + 1) * wrap + width, last_line[width-1], w); /* top right */ |
| 390 |
} |
| 391 |
} |
| 392 |
|
| 393 |
/* generic function for encode/decode called before a frame is coded/decoded */
|
| 394 |
void MPV_frame_start(MpegEncContext *s)
|
| 395 |
{
|
| 396 |
int i;
|
| 397 |
UINT8 *tmp; |
| 398 |
|
| 399 |
s->mb_skiped = 0;
|
| 400 |
if (s->pict_type == B_TYPE) {
|
| 401 |
for(i=0;i<3;i++) { |
| 402 |
s->current_picture[i] = s->aux_picture[i]; |
| 403 |
} |
| 404 |
} else {
|
| 405 |
for(i=0;i<3;i++) { |
| 406 |
/* swap next and last */
|
| 407 |
tmp = s->last_picture[i]; |
| 408 |
s->last_picture[i] = s->next_picture[i]; |
| 409 |
s->next_picture[i] = tmp; |
| 410 |
s->current_picture[i] = tmp; |
| 411 |
} |
| 412 |
} |
| 413 |
} |
| 414 |
|
| 415 |
/* generic function for encode/decode called after a frame has been coded/decoded */
|
| 416 |
void MPV_frame_end(MpegEncContext *s)
|
| 417 |
{
|
| 418 |
/* draw edge for correct motion prediction if outside */
|
| 419 |
if (s->pict_type != B_TYPE && !s->intra_only) {
|
| 420 |
if(s->avctx==NULL || s->avctx->codec->id!=CODEC_ID_MPEG4){ |
| 421 |
draw_edges(s->current_picture[0], s->linesize, s->mb_width*16, s->mb_height*16, EDGE_WIDTH); |
| 422 |
draw_edges(s->current_picture[1], s->linesize/2, s->mb_width*8, s->mb_height*8, EDGE_WIDTH/2); |
| 423 |
draw_edges(s->current_picture[2], s->linesize/2, s->mb_width*8, s->mb_height*8, EDGE_WIDTH/2); |
| 424 |
}else{
|
| 425 |
/* OpenDivx, but i dunno how to distinguish it from mpeg4 */
|
| 426 |
draw_edges(s->current_picture[0], s->linesize, s->width, s->height, EDGE_WIDTH);
|
| 427 |
draw_edges(s->current_picture[1], s->linesize/2, s->width/2, s->height/2, EDGE_WIDTH/2); |
| 428 |
draw_edges(s->current_picture[2], s->linesize/2, s->width/2, s->height/2, EDGE_WIDTH/2); |
| 429 |
} |
| 430 |
} |
| 431 |
emms_c(); |
| 432 |
} |
| 433 |
|
| 434 |
int MPV_encode_picture(AVCodecContext *avctx,
|
| 435 |
unsigned char *buf, int buf_size, void *data) |
| 436 |
{
|
| 437 |
MpegEncContext *s = avctx->priv_data; |
| 438 |
AVPicture *pict = data; |
| 439 |
int i, j;
|
| 440 |
|
| 441 |
if (s->fixed_qscale)
|
| 442 |
s->qscale = avctx->quality; |
| 443 |
|
| 444 |
init_put_bits(&s->pb, buf, buf_size, NULL, NULL); |
| 445 |
|
| 446 |
if (!s->intra_only) {
|
| 447 |
/* first picture of GOP is intra */
|
| 448 |
if ((s->picture_number % s->gop_size) == 0) |
| 449 |
s->pict_type = I_TYPE; |
| 450 |
else
|
| 451 |
s->pict_type = P_TYPE; |
| 452 |
} else {
|
| 453 |
s->pict_type = I_TYPE; |
| 454 |
} |
| 455 |
avctx->key_frame = (s->pict_type == I_TYPE); |
| 456 |
|
| 457 |
MPV_frame_start(s); |
| 458 |
|
| 459 |
for(i=0;i<3;i++) { |
| 460 |
UINT8 *src = pict->data[i]; |
| 461 |
UINT8 *dest = s->current_picture[i]; |
| 462 |
int src_wrap = pict->linesize[i];
|
| 463 |
int dest_wrap = s->linesize;
|
| 464 |
int w = s->width;
|
| 465 |
int h = s->height;
|
| 466 |
|
| 467 |
if (i >= 1) { |
| 468 |
dest_wrap >>= 1;
|
| 469 |
w >>= 1;
|
| 470 |
h >>= 1;
|
| 471 |
} |
| 472 |
|
| 473 |
if(s->intra_only && dest_wrap==src_wrap){
|
| 474 |
s->current_picture[i] = pict->data[i]; |
| 475 |
}else {
|
| 476 |
for(j=0;j<h;j++) { |
| 477 |
memcpy(dest, src, w); |
| 478 |
dest += dest_wrap; |
| 479 |
src += src_wrap; |
| 480 |
} |
| 481 |
} |
| 482 |
s->new_picture[i] = s->current_picture[i]; |
| 483 |
} |
| 484 |
|
| 485 |
encode_picture(s, s->picture_number); |
| 486 |
|
| 487 |
MPV_frame_end(s); |
| 488 |
s->picture_number++; |
| 489 |
|
| 490 |
if (s->out_format == FMT_MJPEG)
|
| 491 |
mjpeg_picture_trailer(s); |
| 492 |
|
| 493 |
flush_put_bits(&s->pb); |
| 494 |
s->total_bits += (s->pb.buf_ptr - s->pb.buf) * 8;
|
| 495 |
avctx->quality = s->qscale; |
| 496 |
return s->pb.buf_ptr - s->pb.buf;
|
| 497 |
} |
| 498 |
|
| 499 |
static inline int clip(int a, int amin, int amax) |
| 500 |
{
|
| 501 |
if (a < amin)
|
| 502 |
return amin;
|
| 503 |
else if (a > amax) |
| 504 |
return amax;
|
| 505 |
else
|
| 506 |
return a;
|
| 507 |
} |
| 508 |
|
| 509 |
/* apply one mpeg motion vector to the three components */
|
| 510 |
static inline void mpeg_motion(MpegEncContext *s, |
| 511 |
UINT8 *dest_y, UINT8 *dest_cb, UINT8 *dest_cr, |
| 512 |
int dest_offset,
|
| 513 |
UINT8 **ref_picture, int src_offset,
|
| 514 |
int field_based, op_pixels_func *pix_op,
|
| 515 |
int motion_x, int motion_y, int h) |
| 516 |
{
|
| 517 |
UINT8 *ptr; |
| 518 |
int dxy, offset, mx, my, src_x, src_y, height, linesize;
|
| 519 |
|
| 520 |
dxy = ((motion_y & 1) << 1) | (motion_x & 1); |
| 521 |
src_x = s->mb_x * 16 + (motion_x >> 1); |
| 522 |
src_y = s->mb_y * (16 >> field_based) + (motion_y >> 1); |
| 523 |
|
| 524 |
/* WARNING: do no forget half pels */
|
| 525 |
height = s->height >> field_based; |
| 526 |
src_x = clip(src_x, -16, s->width);
|
| 527 |
if (src_x == s->width)
|
| 528 |
dxy &= ~1;
|
| 529 |
src_y = clip(src_y, -16, height);
|
| 530 |
if (src_y == height)
|
| 531 |
dxy &= ~2;
|
| 532 |
linesize = s->linesize << field_based; |
| 533 |
ptr = ref_picture[0] + (src_y * linesize) + (src_x) + src_offset;
|
| 534 |
dest_y += dest_offset; |
| 535 |
pix_op[dxy](dest_y, ptr, linesize, h); |
| 536 |
pix_op[dxy](dest_y + 8, ptr + 8, linesize, h); |
| 537 |
|
| 538 |
if (s->out_format == FMT_H263) {
|
| 539 |
dxy = 0;
|
| 540 |
if ((motion_x & 3) != 0) |
| 541 |
dxy |= 1;
|
| 542 |
if ((motion_y & 3) != 0) |
| 543 |
dxy |= 2;
|
| 544 |
mx = motion_x >> 2;
|
| 545 |
my = motion_y >> 2;
|
| 546 |
} else {
|
| 547 |
mx = motion_x / 2;
|
| 548 |
my = motion_y / 2;
|
| 549 |
dxy = ((my & 1) << 1) | (mx & 1); |
| 550 |
mx >>= 1;
|
| 551 |
my >>= 1;
|
| 552 |
} |
| 553 |
|
| 554 |
src_x = s->mb_x * 8 + mx;
|
| 555 |
src_y = s->mb_y * (8 >> field_based) + my;
|
| 556 |
src_x = clip(src_x, -8, s->width >> 1); |
| 557 |
if (src_x == (s->width >> 1)) |
| 558 |
dxy &= ~1;
|
| 559 |
src_y = clip(src_y, -8, height >> 1); |
| 560 |
if (src_y == (height >> 1)) |
| 561 |
dxy &= ~2;
|
| 562 |
|
| 563 |
offset = (src_y * (linesize >> 1)) + src_x + (src_offset >> 1); |
| 564 |
ptr = ref_picture[1] + offset;
|
| 565 |
pix_op[dxy](dest_cb + (dest_offset >> 1), ptr, linesize >> 1, h >> 1); |
| 566 |
ptr = ref_picture[2] + offset;
|
| 567 |
pix_op[dxy](dest_cr + (dest_offset >> 1), ptr, linesize >> 1, h >> 1); |
| 568 |
} |
| 569 |
|
| 570 |
static inline void MPV_motion(MpegEncContext *s, |
| 571 |
UINT8 *dest_y, UINT8 *dest_cb, UINT8 *dest_cr, |
| 572 |
int dir, UINT8 **ref_picture,
|
| 573 |
op_pixels_func *pix_op) |
| 574 |
{
|
| 575 |
int dxy, offset, mx, my, src_x, src_y, motion_x, motion_y;
|
| 576 |
int mb_x, mb_y, i;
|
| 577 |
UINT8 *ptr, *dest; |
| 578 |
|
| 579 |
mb_x = s->mb_x; |
| 580 |
mb_y = s->mb_y; |
| 581 |
|
| 582 |
switch(s->mv_type) {
|
| 583 |
case MV_TYPE_16X16:
|
| 584 |
mpeg_motion(s, dest_y, dest_cb, dest_cr, 0,
|
| 585 |
ref_picture, 0,
|
| 586 |
0, pix_op,
|
| 587 |
s->mv[dir][0][0], s->mv[dir][0][1], 16); |
| 588 |
break;
|
| 589 |
case MV_TYPE_8X8:
|
| 590 |
for(i=0;i<4;i++) { |
| 591 |
motion_x = s->mv[dir][i][0];
|
| 592 |
motion_y = s->mv[dir][i][1];
|
| 593 |
|
| 594 |
dxy = ((motion_y & 1) << 1) | (motion_x & 1); |
| 595 |
src_x = mb_x * 16 + (motion_x >> 1) + (i & 1) * 8; |
| 596 |
src_y = mb_y * 16 + (motion_y >> 1) + ((i >> 1) & 1) * 8; |
| 597 |
|
| 598 |
/* WARNING: do no forget half pels */
|
| 599 |
src_x = clip(src_x, -16, s->width);
|
| 600 |
if (src_x == s->width)
|
| 601 |
dxy &= ~1;
|
| 602 |
src_y = clip(src_y, -16, s->height);
|
| 603 |
if (src_y == s->height)
|
| 604 |
dxy &= ~2;
|
| 605 |
|
| 606 |
ptr = ref_picture[0] + (src_y * s->linesize) + (src_x);
|
| 607 |
dest = dest_y + ((i & 1) * 8) + (i >> 1) * 8 * s->linesize; |
| 608 |
pix_op[dxy](dest, ptr, s->linesize, 8);
|
| 609 |
} |
| 610 |
/* In case of 8X8, we construct a single chroma motion vector
|
| 611 |
with a special rounding */
|
| 612 |
mx = 0;
|
| 613 |
my = 0;
|
| 614 |
for(i=0;i<4;i++) { |
| 615 |
mx += s->mv[dir][i][0];
|
| 616 |
my += s->mv[dir][i][1];
|
| 617 |
} |
| 618 |
if (mx >= 0) |
| 619 |
mx = (h263_chroma_roundtab[mx & 0xf] + ((mx >> 3) & ~1)); |
| 620 |
else {
|
| 621 |
mx = -mx; |
| 622 |
mx = -(h263_chroma_roundtab[mx & 0xf] + ((mx >> 3) & ~1)); |
| 623 |
} |
| 624 |
if (my >= 0) |
| 625 |
my = (h263_chroma_roundtab[my & 0xf] + ((my >> 3) & ~1)); |
| 626 |
else {
|
| 627 |
my = -my; |
| 628 |
my = -(h263_chroma_roundtab[my & 0xf] + ((my >> 3) & ~1)); |
| 629 |
} |
| 630 |
dxy = ((my & 1) << 1) | (mx & 1); |
| 631 |
mx >>= 1;
|
| 632 |
my >>= 1;
|
| 633 |
|
| 634 |
src_x = mb_x * 8 + mx;
|
| 635 |
src_y = mb_y * 8 + my;
|
| 636 |
src_x = clip(src_x, -8, s->width/2); |
| 637 |
if (src_x == s->width/2) |
| 638 |
dxy &= ~1;
|
| 639 |
src_y = clip(src_y, -8, s->height/2); |
| 640 |
if (src_y == s->height/2) |
| 641 |
dxy &= ~2;
|
| 642 |
|
| 643 |
offset = (src_y * (s->linesize >> 1)) + src_x;
|
| 644 |
ptr = ref_picture[1] + offset;
|
| 645 |
pix_op[dxy](dest_cb, ptr, s->linesize >> 1, 8); |
| 646 |
ptr = ref_picture[2] + offset;
|
| 647 |
pix_op[dxy](dest_cr, ptr, s->linesize >> 1, 8); |
| 648 |
break;
|
| 649 |
case MV_TYPE_FIELD:
|
| 650 |
if (s->picture_structure == PICT_FRAME) {
|
| 651 |
/* top field */
|
| 652 |
mpeg_motion(s, dest_y, dest_cb, dest_cr, 0,
|
| 653 |
ref_picture, s->field_select[dir][0] ? s->linesize : 0, |
| 654 |
1, pix_op,
|
| 655 |
s->mv[dir][0][0], s->mv[dir][0][1], 8); |
| 656 |
/* bottom field */
|
| 657 |
mpeg_motion(s, dest_y, dest_cb, dest_cr, s->linesize, |
| 658 |
ref_picture, s->field_select[dir][1] ? s->linesize : 0, |
| 659 |
1, pix_op,
|
| 660 |
s->mv[dir][1][0], s->mv[dir][1][1], 8); |
| 661 |
} else {
|
| 662 |
|
| 663 |
|
| 664 |
} |
| 665 |
break;
|
| 666 |
} |
| 667 |
} |
| 668 |
|
| 669 |
|
| 670 |
/* put block[] to dest[] */
|
| 671 |
static inline void put_dct(MpegEncContext *s, |
| 672 |
DCTELEM *block, int i, UINT8 *dest, int line_size) |
| 673 |
{
|
| 674 |
if (!s->mpeg2)
|
| 675 |
s->dct_unquantize(s, block, i, s->qscale); |
| 676 |
ff_idct (block); |
| 677 |
put_pixels_clamped(block, dest, line_size); |
| 678 |
} |
| 679 |
|
| 680 |
/* add block[] to dest[] */
|
| 681 |
static inline void add_dct(MpegEncContext *s, |
| 682 |
DCTELEM *block, int i, UINT8 *dest, int line_size) |
| 683 |
{
|
| 684 |
if (s->block_last_index[i] >= 0) { |
| 685 |
if (!s->mpeg2)
|
| 686 |
if(s->encoding || (!s->h263_msmpeg4))
|
| 687 |
s->dct_unquantize(s, block, i, s->qscale); |
| 688 |
ff_idct (block); |
| 689 |
add_pixels_clamped(block, dest, line_size); |
| 690 |
} |
| 691 |
} |
| 692 |
|
| 693 |
/* generic function called after a macroblock has been parsed by the
|
| 694 |
decoder or after it has been encoded by the encoder.
|
| 695 |
|
| 696 |
Important variables used:
|
| 697 |
s->mb_intra : true if intra macroblock
|
| 698 |
s->mv_dir : motion vector direction
|
| 699 |
s->mv_type : motion vector type
|
| 700 |
s->mv : motion vector
|
| 701 |
s->interlaced_dct : true if interlaced dct used (mpeg2)
|
| 702 |
*/
|
| 703 |
void MPV_decode_mb(MpegEncContext *s, DCTELEM block[6][64]) |
| 704 |
{
|
| 705 |
int mb_x, mb_y, motion_x, motion_y;
|
| 706 |
int dct_linesize, dct_offset;
|
| 707 |
op_pixels_func *op_pix; |
| 708 |
|
| 709 |
mb_x = s->mb_x; |
| 710 |
mb_y = s->mb_y; |
| 711 |
|
| 712 |
#ifdef FF_POSTPROCESS
|
| 713 |
quant_store[mb_y][mb_x]=s->qscale; |
| 714 |
//printf("[%02d][%02d] %d\n",mb_x,mb_y,s->qscale);
|
| 715 |
#endif
|
| 716 |
|
| 717 |
/* update DC predictors for P macroblocks */
|
| 718 |
if (!s->mb_intra) {
|
| 719 |
if (s->h263_pred) {
|
| 720 |
if(s->mbintra_table[mb_x + mb_y*s->mb_width])
|
| 721 |
{
|
| 722 |
int wrap, x, y, v;
|
| 723 |
s->mbintra_table[mb_x + mb_y*s->mb_width]=0;
|
| 724 |
|
| 725 |
wrap = 2 * s->mb_width + 2; |
| 726 |
v = 1024;
|
| 727 |
x = 2 * mb_x + 1; |
| 728 |
y = 2 * mb_y + 1; |
| 729 |
|
| 730 |
s->dc_val[0][(x) + (y) * wrap] = v;
|
| 731 |
s->dc_val[0][(x + 1) + (y) * wrap] = v; |
| 732 |
s->dc_val[0][(x) + (y + 1) * wrap] = v; |
| 733 |
s->dc_val[0][(x + 1) + (y + 1) * wrap] = v; |
| 734 |
/* ac pred */
|
| 735 |
memset(s->ac_val[0][(x) + (y) * wrap], 0, 16 * sizeof(INT16)); |
| 736 |
memset(s->ac_val[0][(x + 1) + (y) * wrap], 0, 16 * sizeof(INT16)); |
| 737 |
memset(s->ac_val[0][(x) + (y + 1) * wrap], 0, 16 * sizeof(INT16)); |
| 738 |
memset(s->ac_val[0][(x + 1) + (y + 1) * wrap], 0, 16 * sizeof(INT16)); |
| 739 |
if (s->h263_msmpeg4) {
|
| 740 |
s->coded_block[(x) + (y) * wrap] = 0;
|
| 741 |
s->coded_block[(x + 1) + (y) * wrap] = 0; |
| 742 |
s->coded_block[(x) + (y + 1) * wrap] = 0; |
| 743 |
s->coded_block[(x + 1) + (y + 1) * wrap] = 0; |
| 744 |
} |
| 745 |
/* chroma */
|
| 746 |
wrap = s->mb_width + 2;
|
| 747 |
x = mb_x + 1;
|
| 748 |
y = mb_y + 1;
|
| 749 |
s->dc_val[1][(x) + (y) * wrap] = v;
|
| 750 |
s->dc_val[2][(x) + (y) * wrap] = v;
|
| 751 |
/* ac pred */
|
| 752 |
memset(s->ac_val[1][(x) + (y) * wrap], 0, 16 * sizeof(INT16)); |
| 753 |
memset(s->ac_val[2][(x) + (y) * wrap], 0, 16 * sizeof(INT16)); |
| 754 |
} |
| 755 |
} else {
|
| 756 |
s->last_dc[0] = 128 << s->intra_dc_precision; |
| 757 |
s->last_dc[1] = 128 << s->intra_dc_precision; |
| 758 |
s->last_dc[2] = 128 << s->intra_dc_precision; |
| 759 |
} |
| 760 |
} |
| 761 |
else if (s->h263_pred) |
| 762 |
s->mbintra_table[mb_x + mb_y*s->mb_width]=1;
|
| 763 |
|
| 764 |
/* update motion predictor */
|
| 765 |
if (s->out_format == FMT_H263) {
|
| 766 |
int x, y, wrap;
|
| 767 |
|
| 768 |
x = 2 * mb_x + 1; |
| 769 |
y = 2 * mb_y + 1; |
| 770 |
wrap = 2 * s->mb_width + 2; |
| 771 |
if (s->mb_intra) {
|
| 772 |
motion_x = 0;
|
| 773 |
motion_y = 0;
|
| 774 |
goto motion_init;
|
| 775 |
} else if (s->mv_type == MV_TYPE_16X16) { |
| 776 |
motion_x = s->mv[0][0][0]; |
| 777 |
motion_y = s->mv[0][0][1]; |
| 778 |
motion_init:
|
| 779 |
/* no update if 8X8 because it has been done during parsing */
|
| 780 |
s->motion_val[(x) + (y) * wrap][0] = motion_x;
|
| 781 |
s->motion_val[(x) + (y) * wrap][1] = motion_y;
|
| 782 |
s->motion_val[(x + 1) + (y) * wrap][0] = motion_x; |
| 783 |
s->motion_val[(x + 1) + (y) * wrap][1] = motion_y; |
| 784 |
s->motion_val[(x) + (y + 1) * wrap][0] = motion_x; |
| 785 |
s->motion_val[(x) + (y + 1) * wrap][1] = motion_y; |
| 786 |
s->motion_val[(x + 1) + (y + 1) * wrap][0] = motion_x; |
| 787 |
s->motion_val[(x + 1) + (y + 1) * wrap][1] = motion_y; |
| 788 |
} |
| 789 |
} |
| 790 |
|
| 791 |
if (!s->intra_only) {
|
| 792 |
UINT8 *dest_y, *dest_cb, *dest_cr; |
| 793 |
UINT8 *mbskip_ptr; |
| 794 |
|
| 795 |
/* avoid copy if macroblock skipped in last frame too */
|
| 796 |
if (!s->encoding && s->pict_type != B_TYPE) {
|
| 797 |
mbskip_ptr = &s->mbskip_table[s->mb_y * s->mb_width + s->mb_x]; |
| 798 |
if (s->mb_skiped) {
|
| 799 |
s->mb_skiped = 0;
|
| 800 |
/* if previous was skipped too, then nothing to do ! */
|
| 801 |
if (*mbskip_ptr != 0) |
| 802 |
goto the_end;
|
| 803 |
*mbskip_ptr = 1; /* indicate that this time we skiped it */ |
| 804 |
} else {
|
| 805 |
*mbskip_ptr = 0; /* not skipped */ |
| 806 |
} |
| 807 |
} |
| 808 |
|
| 809 |
dest_y = s->current_picture[0] + (mb_y * 16 * s->linesize) + mb_x * 16; |
| 810 |
dest_cb = s->current_picture[1] + (mb_y * 8 * (s->linesize >> 1)) + mb_x * 8; |
| 811 |
dest_cr = s->current_picture[2] + (mb_y * 8 * (s->linesize >> 1)) + mb_x * 8; |
| 812 |
|
| 813 |
if (s->interlaced_dct) {
|
| 814 |
dct_linesize = s->linesize * 2;
|
| 815 |
dct_offset = s->linesize; |
| 816 |
} else {
|
| 817 |
dct_linesize = s->linesize; |
| 818 |
dct_offset = s->linesize * 8;
|
| 819 |
} |
| 820 |
|
| 821 |
if (!s->mb_intra) {
|
| 822 |
/* motion handling */
|
| 823 |
if (!s->no_rounding)
|
| 824 |
op_pix = put_pixels_tab; |
| 825 |
else
|
| 826 |
op_pix = put_no_rnd_pixels_tab; |
| 827 |
|
| 828 |
if (s->mv_dir & MV_DIR_FORWARD) {
|
| 829 |
MPV_motion(s, dest_y, dest_cb, dest_cr, 0, s->last_picture, op_pix);
|
| 830 |
if (!s->no_rounding)
|
| 831 |
op_pix = avg_pixels_tab; |
| 832 |
else
|
| 833 |
op_pix = avg_no_rnd_pixels_tab; |
| 834 |
} |
| 835 |
if (s->mv_dir & MV_DIR_BACKWARD) {
|
| 836 |
MPV_motion(s, dest_y, dest_cb, dest_cr, 1, s->next_picture, op_pix);
|
| 837 |
} |
| 838 |
|
| 839 |
/* add dct residue */
|
| 840 |
add_dct(s, block[0], 0, dest_y, dct_linesize); |
| 841 |
add_dct(s, block[1], 1, dest_y + 8, dct_linesize); |
| 842 |
add_dct(s, block[2], 2, dest_y + dct_offset, dct_linesize); |
| 843 |
add_dct(s, block[3], 3, dest_y + dct_offset + 8, dct_linesize); |
| 844 |
|
| 845 |
add_dct(s, block[4], 4, dest_cb, s->linesize >> 1); |
| 846 |
add_dct(s, block[5], 5, dest_cr, s->linesize >> 1); |
| 847 |
} else {
|
| 848 |
/* dct only in intra block */
|
| 849 |
put_dct(s, block[0], 0, dest_y, dct_linesize); |
| 850 |
put_dct(s, block[1], 1, dest_y + 8, dct_linesize); |
| 851 |
put_dct(s, block[2], 2, dest_y + dct_offset, dct_linesize); |
| 852 |
put_dct(s, block[3], 3, dest_y + dct_offset + 8, dct_linesize); |
| 853 |
|
| 854 |
put_dct(s, block[4], 4, dest_cb, s->linesize >> 1); |
| 855 |
put_dct(s, block[5], 5, dest_cr, s->linesize >> 1); |
| 856 |
} |
| 857 |
} |
| 858 |
the_end:
|
| 859 |
emms_c(); |
| 860 |
} |
| 861 |
|
| 862 |
static void encode_picture(MpegEncContext *s, int picture_number) |
| 863 |
{
|
| 864 |
int mb_x, mb_y, wrap, last_gob;
|
| 865 |
UINT8 *ptr; |
| 866 |
int i, motion_x, motion_y;
|
| 867 |
|
| 868 |
s->picture_number = picture_number; |
| 869 |
if (!s->fixed_qscale)
|
| 870 |
s->qscale = rate_estimate_qscale(s); |
| 871 |
|
| 872 |
/* precompute matrix */
|
| 873 |
if (s->out_format == FMT_MJPEG) {
|
| 874 |
/* for mjpeg, we do include qscale in the matrix */
|
| 875 |
s->intra_matrix[0] = default_intra_matrix[0]; |
| 876 |
for(i=1;i<64;i++) |
| 877 |
s->intra_matrix[i] = (default_intra_matrix[i] * s->qscale) >> 3;
|
| 878 |
convert_matrix(s->q_intra_matrix, s->q_intra_matrix16, s->intra_matrix, 8);
|
| 879 |
} else {
|
| 880 |
convert_matrix(s->q_intra_matrix, s->q_intra_matrix16, s->intra_matrix, s->qscale); |
| 881 |
convert_matrix(s->q_non_intra_matrix, s->q_non_intra_matrix16, s->non_intra_matrix, s->qscale); |
| 882 |
} |
| 883 |
|
| 884 |
switch(s->out_format) {
|
| 885 |
case FMT_MJPEG:
|
| 886 |
mjpeg_picture_header(s); |
| 887 |
break;
|
| 888 |
case FMT_H263:
|
| 889 |
if (s->h263_msmpeg4)
|
| 890 |
msmpeg4_encode_picture_header(s, picture_number); |
| 891 |
else if (s->h263_pred) |
| 892 |
mpeg4_encode_picture_header(s, picture_number); |
| 893 |
else if (s->h263_rv10) |
| 894 |
rv10_encode_picture_header(s, picture_number); |
| 895 |
else
|
| 896 |
h263_encode_picture_header(s, picture_number); |
| 897 |
break;
|
| 898 |
case FMT_MPEG1:
|
| 899 |
mpeg1_encode_picture_header(s, picture_number); |
| 900 |
break;
|
| 901 |
} |
| 902 |
|
| 903 |
/* init last dc values */
|
| 904 |
/* note: quant matrix value (8) is implied here */
|
| 905 |
s->last_dc[0] = 128; |
| 906 |
s->last_dc[1] = 128; |
| 907 |
s->last_dc[2] = 128; |
| 908 |
s->mb_incr = 1;
|
| 909 |
s->last_mv[0][0][0] = 0; |
| 910 |
s->last_mv[0][0][1] = 0; |
| 911 |
s->mv_type = MV_TYPE_16X16; |
| 912 |
s->mv_dir = MV_DIR_FORWARD; |
| 913 |
|
| 914 |
/* Get the GOB height based on picture height */
|
| 915 |
if (s->out_format == FMT_H263 && s->h263_plus) {
|
| 916 |
if (s->height <= 400) |
| 917 |
s->gob_index = 1;
|
| 918 |
else if (s->height <= 800) |
| 919 |
s->gob_index = 2;
|
| 920 |
else
|
| 921 |
s->gob_index = 4;
|
| 922 |
} |
| 923 |
|
| 924 |
for(mb_y=0; mb_y < s->mb_height; mb_y++) { |
| 925 |
/* Put GOB header based on RTP MTU */
|
| 926 |
if (!mb_y) {
|
| 927 |
s->ptr_lastgob = s->pb.buf_ptr; |
| 928 |
s->ptr_last_mb_line = s->pb.buf_ptr; |
| 929 |
} else if (s->out_format == FMT_H263 && s->h263_plus) { |
| 930 |
last_gob = h263_encode_gob_header(s, mb_y); |
| 931 |
if (last_gob) {
|
| 932 |
//fprintf(stderr,"\nLast GOB size: %d", last_gob);
|
| 933 |
s->first_gob_line = 1;
|
| 934 |
} else
|
| 935 |
s->first_gob_line = 0;
|
| 936 |
} |
| 937 |
for(mb_x=0; mb_x < s->mb_width; mb_x++) { |
| 938 |
|
| 939 |
s->mb_x = mb_x; |
| 940 |
s->mb_y = mb_y; |
| 941 |
|
| 942 |
/* compute motion vector and macro block type (intra or non intra) */
|
| 943 |
motion_x = 0;
|
| 944 |
motion_y = 0;
|
| 945 |
if (s->pict_type == P_TYPE) {
|
| 946 |
s->mb_intra = estimate_motion(s, mb_x, mb_y, |
| 947 |
&motion_x, |
| 948 |
&motion_y); |
| 949 |
} else {
|
| 950 |
s->mb_intra = 1;
|
| 951 |
} |
| 952 |
|
| 953 |
/* get the pixels */
|
| 954 |
wrap = s->linesize; |
| 955 |
ptr = s->new_picture[0] + (mb_y * 16 * wrap) + mb_x * 16; |
| 956 |
get_pixels(s->block[0], ptr, wrap);
|
| 957 |
get_pixels(s->block[1], ptr + 8, wrap); |
| 958 |
get_pixels(s->block[2], ptr + 8 * wrap, wrap); |
| 959 |
get_pixels(s->block[3], ptr + 8 * wrap + 8, wrap); |
| 960 |
wrap = s->linesize >> 1;
|
| 961 |
ptr = s->new_picture[1] + (mb_y * 8 * wrap) + mb_x * 8; |
| 962 |
get_pixels(s->block[4], ptr, wrap);
|
| 963 |
|
| 964 |
wrap = s->linesize >> 1;
|
| 965 |
ptr = s->new_picture[2] + (mb_y * 8 * wrap) + mb_x * 8; |
| 966 |
get_pixels(s->block[5], ptr, wrap);
|
| 967 |
|
| 968 |
/* subtract previous frame if non intra */
|
| 969 |
if (!s->mb_intra) {
|
| 970 |
int dxy, offset, mx, my;
|
| 971 |
|
| 972 |
dxy = ((motion_y & 1) << 1) | (motion_x & 1); |
| 973 |
ptr = s->last_picture[0] +
|
| 974 |
((mb_y * 16 + (motion_y >> 1)) * s->linesize) + |
| 975 |
(mb_x * 16 + (motion_x >> 1)); |
| 976 |
|
| 977 |
sub_pixels_2(s->block[0], ptr, s->linesize, dxy);
|
| 978 |
sub_pixels_2(s->block[1], ptr + 8, s->linesize, dxy); |
| 979 |
sub_pixels_2(s->block[2], ptr + s->linesize * 8, s->linesize, dxy); |
| 980 |
sub_pixels_2(s->block[3], ptr + 8 + s->linesize * 8, s->linesize ,dxy); |
| 981 |
|
| 982 |
if (s->out_format == FMT_H263) {
|
| 983 |
/* special rounding for h263 */
|
| 984 |
dxy = 0;
|
| 985 |
if ((motion_x & 3) != 0) |
| 986 |
dxy |= 1;
|
| 987 |
if ((motion_y & 3) != 0) |
| 988 |
dxy |= 2;
|
| 989 |
mx = motion_x >> 2;
|
| 990 |
my = motion_y >> 2;
|
| 991 |
} else {
|
| 992 |
mx = motion_x / 2;
|
| 993 |
my = motion_y / 2;
|
| 994 |
dxy = ((my & 1) << 1) | (mx & 1); |
| 995 |
mx >>= 1;
|
| 996 |
my >>= 1;
|
| 997 |
} |
| 998 |
offset = ((mb_y * 8 + my) * (s->linesize >> 1)) + (mb_x * 8 + mx); |
| 999 |
ptr = s->last_picture[1] + offset;
|
| 1000 |
sub_pixels_2(s->block[4], ptr, s->linesize >> 1, dxy); |
| 1001 |
ptr = s->last_picture[2] + offset;
|
| 1002 |
sub_pixels_2(s->block[5], ptr, s->linesize >> 1, dxy); |
| 1003 |
} |
| 1004 |
emms_c(); |
| 1005 |
|
| 1006 |
/* DCT & quantize */
|
| 1007 |
if (s->h263_msmpeg4) {
|
| 1008 |
msmpeg4_dc_scale(s); |
| 1009 |
} else if (s->h263_pred) { |
| 1010 |
h263_dc_scale(s); |
| 1011 |
} else {
|
| 1012 |
/* default quantization values */
|
| 1013 |
s->y_dc_scale = 8;
|
| 1014 |
s->c_dc_scale = 8;
|
| 1015 |
} |
| 1016 |
for(i=0;i<6;i++) { |
| 1017 |
s->block_last_index[i] = dct_quantize(s, s->block[i], i, s->qscale); |
| 1018 |
} |
| 1019 |
|
| 1020 |
/* huffman encode */
|
| 1021 |
switch(s->out_format) {
|
| 1022 |
case FMT_MPEG1:
|
| 1023 |
mpeg1_encode_mb(s, s->block, motion_x, motion_y); |
| 1024 |
break;
|
| 1025 |
case FMT_H263:
|
| 1026 |
if (s->h263_msmpeg4)
|
| 1027 |
msmpeg4_encode_mb(s, s->block, motion_x, motion_y); |
| 1028 |
else
|
| 1029 |
h263_encode_mb(s, s->block, motion_x, motion_y); |
| 1030 |
break;
|
| 1031 |
case FMT_MJPEG:
|
| 1032 |
mjpeg_encode_mb(s, s->block); |
| 1033 |
break;
|
| 1034 |
} |
| 1035 |
|
| 1036 |
/* decompress blocks so that we keep the state of the decoder */
|
| 1037 |
s->mv[0][0][0] = motion_x; |
| 1038 |
s->mv[0][0][1] = motion_y; |
| 1039 |
|
| 1040 |
MPV_decode_mb(s, s->block); |
| 1041 |
} |
| 1042 |
/* Obtain average MB line size for RTP */
|
| 1043 |
if (!mb_y)
|
| 1044 |
s->mb_line_avgsize = s->pb.buf_ptr - s->ptr_last_mb_line; |
| 1045 |
else
|
| 1046 |
s->mb_line_avgsize = (s->mb_line_avgsize + s->pb.buf_ptr - s->ptr_last_mb_line) >> 1;
|
| 1047 |
//fprintf(stderr, "\nMB line: %d\tSize: %u\tAvg. Size: %u", s->mb_y,
|
| 1048 |
// (s->pb.buf_ptr - s->ptr_last_mb_line), s->mb_line_avgsize);
|
| 1049 |
s->ptr_last_mb_line = s->pb.buf_ptr; |
| 1050 |
} |
| 1051 |
|
| 1052 |
if (s->h263_msmpeg4)
|
| 1053 |
msmpeg4_encode_ext_header(s); |
| 1054 |
|
| 1055 |
//if (s->gob_number)
|
| 1056 |
// fprintf(stderr,"\nNumber of GOB: %d", s->gob_number);
|
| 1057 |
} |
| 1058 |
|
| 1059 |
static int dct_quantize_c(MpegEncContext *s, |
| 1060 |
DCTELEM *block, int n,
|
| 1061 |
int qscale)
|
| 1062 |
{
|
| 1063 |
int i, j, level, last_non_zero, q;
|
| 1064 |
const int *qmat; |
| 1065 |
int minLevel, maxLevel;
|
| 1066 |
|
| 1067 |
if(s->avctx!=NULL && s->avctx->codec->id==CODEC_ID_MPEG4){ |
| 1068 |
/* mpeg4 */
|
| 1069 |
minLevel= -2048;
|
| 1070 |
maxLevel= 2047;
|
| 1071 |
}else if(s->out_format==FMT_MPEG1){ |
| 1072 |
/* mpeg1 */
|
| 1073 |
minLevel= -255;
|
| 1074 |
maxLevel= 255;
|
| 1075 |
}else{
|
| 1076 |
/* h263 / msmpeg4 */
|
| 1077 |
minLevel= -128;
|
| 1078 |
maxLevel= 127;
|
| 1079 |
} |
| 1080 |
|
| 1081 |
av_fdct (block); |
| 1082 |
|
| 1083 |
/* we need this permutation so that we correct the IDCT
|
| 1084 |
permutation. will be moved into DCT code */
|
| 1085 |
block_permute(block); |
| 1086 |
|
| 1087 |
if (s->mb_intra) {
|
| 1088 |
if (n < 4) |
| 1089 |
q = s->y_dc_scale; |
| 1090 |
else
|
| 1091 |
q = s->c_dc_scale; |
| 1092 |
q = q << 3;
|
| 1093 |
|
| 1094 |
/* note: block[0] is assumed to be positive */
|
| 1095 |
block[0] = (block[0] + (q >> 1)) / q; |
| 1096 |
i = 1;
|
| 1097 |
last_non_zero = 0;
|
| 1098 |
if (s->out_format == FMT_H263) {
|
| 1099 |
qmat = s->q_non_intra_matrix; |
| 1100 |
} else {
|
| 1101 |
qmat = s->q_intra_matrix; |
| 1102 |
} |
| 1103 |
} else {
|
| 1104 |
i = 0;
|
| 1105 |
last_non_zero = -1;
|
| 1106 |
qmat = s->q_non_intra_matrix; |
| 1107 |
} |
| 1108 |
|
| 1109 |
for(;i<64;i++) { |
| 1110 |
j = zigzag_direct[i]; |
| 1111 |
level = block[j]; |
| 1112 |
level = level * qmat[j]; |
| 1113 |
#ifdef PARANOID
|
| 1114 |
{
|
| 1115 |
static int count = 0; |
| 1116 |
int level1, level2, qmat1;
|
| 1117 |
double val;
|
| 1118 |
if (qmat == s->q_non_intra_matrix) {
|
| 1119 |
qmat1 = default_non_intra_matrix[j] * s->qscale; |
| 1120 |
} else {
|
| 1121 |
qmat1 = default_intra_matrix[j] * s->qscale; |
| 1122 |
} |
| 1123 |
if (av_fdct != jpeg_fdct_ifast)
|
| 1124 |
val = ((double)block[j] * 8.0) / (double)qmat1; |
| 1125 |
else
|
| 1126 |
val = ((double)block[j] * 8.0 * 2048.0) / |
| 1127 |
((double)qmat1 * aanscales[j]);
|
| 1128 |
level1 = (int)val;
|
| 1129 |
level2 = level / (1 << (QMAT_SHIFT - 3)); |
| 1130 |
if (level1 != level2) {
|
| 1131 |
fprintf(stderr, "%d: quant error qlevel=%d wanted=%d level=%d qmat1=%d qmat=%d wantedf=%0.6f\n",
|
| 1132 |
count, level2, level1, block[j], qmat1, qmat[j], |
| 1133 |
val); |
| 1134 |
count++; |
| 1135 |
} |
| 1136 |
|
| 1137 |
} |
| 1138 |
#endif
|
| 1139 |
/* XXX: slight error for the low range. Test should be equivalent to
|
| 1140 |
(level <= -(1 << (QMAT_SHIFT - 3)) || level >= (1 <<
|
| 1141 |
(QMAT_SHIFT - 3)))
|
| 1142 |
*/
|
| 1143 |
if (((level << (31 - (QMAT_SHIFT - 3))) >> (31 - (QMAT_SHIFT - 3))) != |
| 1144 |
level) {
|
| 1145 |
level = level / (1 << (QMAT_SHIFT - 3)); |
| 1146 |
/* XXX: currently, this code is not optimal. the range should be:
|
| 1147 |
mpeg1: -255..255
|
| 1148 |
mpeg2: -2048..2047
|
| 1149 |
h263: -128..127
|
| 1150 |
mpeg4: -2048..2047
|
| 1151 |
*/
|
| 1152 |
if (level > maxLevel)
|
| 1153 |
level = maxLevel; |
| 1154 |
else if (level < minLevel) |
| 1155 |
level = minLevel; |
| 1156 |
|
| 1157 |
block[j] = level; |
| 1158 |
last_non_zero = i; |
| 1159 |
} else {
|
| 1160 |
block[j] = 0;
|
| 1161 |
} |
| 1162 |
} |
| 1163 |
return last_non_zero;
|
| 1164 |
} |
| 1165 |
|
| 1166 |
static void dct_unquantize_mpeg1_c(MpegEncContext *s, |
| 1167 |
DCTELEM *block, int n, int qscale) |
| 1168 |
{
|
| 1169 |
int i, level, nCoeffs;
|
| 1170 |
const UINT16 *quant_matrix;
|
| 1171 |
|
| 1172 |
if(s->alternate_scan) nCoeffs= 64; |
| 1173 |
else nCoeffs= s->block_last_index[n]+1; |
| 1174 |
|
| 1175 |
if (s->mb_intra) {
|
| 1176 |
if (n < 4) |
| 1177 |
block[0] = block[0] * s->y_dc_scale; |
| 1178 |
else
|
| 1179 |
block[0] = block[0] * s->c_dc_scale; |
| 1180 |
/* XXX: only mpeg1 */
|
| 1181 |
quant_matrix = s->intra_matrix; |
| 1182 |
for(i=1;i<nCoeffs;i++) { |
| 1183 |
int j= zigzag_direct[i];
|
| 1184 |
level = block[j]; |
| 1185 |
if (level) {
|
| 1186 |
if (level < 0) { |
| 1187 |
level = -level; |
| 1188 |
level = (int)(level * qscale * quant_matrix[j]) >> 3; |
| 1189 |
level = (level - 1) | 1; |
| 1190 |
level = -level; |
| 1191 |
} else {
|
| 1192 |
level = (int)(level * qscale * quant_matrix[j]) >> 3; |
| 1193 |
level = (level - 1) | 1; |
| 1194 |
} |
| 1195 |
#ifdef PARANOID
|
| 1196 |
if (level < -2048 || level > 2047) |
| 1197 |
fprintf(stderr, "unquant error %d %d\n", i, level);
|
| 1198 |
#endif
|
| 1199 |
block[j] = level; |
| 1200 |
} |
| 1201 |
} |
| 1202 |
} else {
|
| 1203 |
i = 0;
|
| 1204 |
quant_matrix = s->non_intra_matrix; |
| 1205 |
for(;i<nCoeffs;i++) {
|
| 1206 |
int j= zigzag_direct[i];
|
| 1207 |
level = block[j]; |
| 1208 |
if (level) {
|
| 1209 |
if (level < 0) { |
| 1210 |
level = -level; |
| 1211 |
level = (((level << 1) + 1) * qscale * |
| 1212 |
((int) (quant_matrix[j]))) >> 4; |
| 1213 |
level = (level - 1) | 1; |
| 1214 |
level = -level; |
| 1215 |
} else {
|
| 1216 |
level = (((level << 1) + 1) * qscale * |
| 1217 |
((int) (quant_matrix[j]))) >> 4; |
| 1218 |
level = (level - 1) | 1; |
| 1219 |
} |
| 1220 |
#ifdef PARANOID
|
| 1221 |
if (level < -2048 || level > 2047) |
| 1222 |
fprintf(stderr, "unquant error %d %d\n", i, level);
|
| 1223 |
#endif
|
| 1224 |
block[j] = level; |
| 1225 |
} |
| 1226 |
} |
| 1227 |
} |
| 1228 |
} |
| 1229 |
|
| 1230 |
static void dct_unquantize_h263_c(MpegEncContext *s, |
| 1231 |
DCTELEM *block, int n, int qscale) |
| 1232 |
{
|
| 1233 |
int i, level, qmul, qadd;
|
| 1234 |
int nCoeffs;
|
| 1235 |
|
| 1236 |
if (s->mb_intra) {
|
| 1237 |
if (n < 4) |
| 1238 |
block[0] = block[0] * s->y_dc_scale; |
| 1239 |
else
|
| 1240 |
block[0] = block[0] * s->c_dc_scale; |
| 1241 |
i = 1;
|
| 1242 |
nCoeffs= 64; //does not allways use zigzag table |
| 1243 |
} else {
|
| 1244 |
i = 0;
|
| 1245 |
nCoeffs= zigzag_end[ s->block_last_index[n] ]; |
| 1246 |
} |
| 1247 |
|
| 1248 |
qmul = s->qscale << 1;
|
| 1249 |
qadd = (s->qscale - 1) | 1; |
| 1250 |
|
| 1251 |
for(;i<nCoeffs;i++) {
|
| 1252 |
level = block[i]; |
| 1253 |
if (level) {
|
| 1254 |
if (level < 0) { |
| 1255 |
level = level * qmul - qadd; |
| 1256 |
} else {
|
| 1257 |
level = level * qmul + qadd; |
| 1258 |
} |
| 1259 |
#ifdef PARANOID
|
| 1260 |
if (level < -2048 || level > 2047) |
| 1261 |
fprintf(stderr, "unquant error %d %d\n", i, level);
|
| 1262 |
#endif
|
| 1263 |
block[i] = level; |
| 1264 |
} |
| 1265 |
} |
| 1266 |
} |
| 1267 |
|
| 1268 |
/* rate control */
|
| 1269 |
|
| 1270 |
/* an I frame is I_FRAME_SIZE_RATIO bigger than a P frame */
|
| 1271 |
#define I_FRAME_SIZE_RATIO 3.0 |
| 1272 |
#define QSCALE_K 20 |
| 1273 |
|
| 1274 |
static void rate_control_init(MpegEncContext *s) |
| 1275 |
{
|
| 1276 |
s->wanted_bits = 0;
|
| 1277 |
|
| 1278 |
if (s->intra_only) {
|
| 1279 |
s->I_frame_bits = ((INT64)s->bit_rate * FRAME_RATE_BASE) / s->frame_rate; |
| 1280 |
s->P_frame_bits = s->I_frame_bits; |
| 1281 |
} else {
|
| 1282 |
s->P_frame_bits = (int) ((float)(s->gop_size * s->bit_rate) / |
| 1283 |
(float)((float)s->frame_rate / FRAME_RATE_BASE * (I_FRAME_SIZE_RATIO + s->gop_size - 1))); |
| 1284 |
s->I_frame_bits = (int)(s->P_frame_bits * I_FRAME_SIZE_RATIO);
|
| 1285 |
} |
| 1286 |
|
| 1287 |
#if defined(DEBUG)
|
| 1288 |
printf("I_frame_size=%d P_frame_size=%d\n",
|
| 1289 |
s->I_frame_bits, s->P_frame_bits); |
| 1290 |
#endif
|
| 1291 |
} |
| 1292 |
|
| 1293 |
|
| 1294 |
/*
|
| 1295 |
* This heuristic is rather poor, but at least we do not have to
|
| 1296 |
* change the qscale at every macroblock.
|
| 1297 |
*/
|
| 1298 |
static int rate_estimate_qscale(MpegEncContext *s) |
| 1299 |
{
|
| 1300 |
INT64 diff, total_bits = s->total_bits; |
| 1301 |
float q;
|
| 1302 |
int qscale, qmin;
|
| 1303 |
|
| 1304 |
if (s->pict_type == I_TYPE) {
|
| 1305 |
s->wanted_bits += s->I_frame_bits; |
| 1306 |
} else {
|
| 1307 |
s->wanted_bits += s->P_frame_bits; |
| 1308 |
} |
| 1309 |
diff = s->wanted_bits - total_bits; |
| 1310 |
q = 31.0 - (float)diff / (QSCALE_K * s->mb_height * s->mb_width); |
| 1311 |
/* adjust for I frame */
|
| 1312 |
if (s->pict_type == I_TYPE && !s->intra_only) {
|
| 1313 |
q /= I_FRAME_SIZE_RATIO; |
| 1314 |
} |
| 1315 |
|
| 1316 |
/* using a too small Q scale leeds to problems in mpeg1 and h263
|
| 1317 |
because AC coefficients are clamped to 255 or 127 */
|
| 1318 |
qmin = 3;
|
| 1319 |
if (q < qmin)
|
| 1320 |
q = qmin; |
| 1321 |
else if (q > 31) |
| 1322 |
q = 31;
|
| 1323 |
qscale = (int)(q + 0.5); |
| 1324 |
#if defined(DEBUG)
|
| 1325 |
printf("%d: total=%0.0f br=%0.1f diff=%d qest=%0.1f\n",
|
| 1326 |
s->picture_number, |
| 1327 |
(double)total_bits,
|
| 1328 |
(float)s->frame_rate / FRAME_RATE_BASE *
|
| 1329 |
total_bits / s->picture_number, |
| 1330 |
diff, q); |
| 1331 |
#endif
|
| 1332 |
return qscale;
|
| 1333 |
} |
| 1334 |
|
| 1335 |
AVCodec mpeg1video_encoder = {
|
| 1336 |
"mpeg1video",
|
| 1337 |
CODEC_TYPE_VIDEO, |
| 1338 |
CODEC_ID_MPEG1VIDEO, |
| 1339 |
sizeof(MpegEncContext),
|
| 1340 |
MPV_encode_init, |
| 1341 |
MPV_encode_picture, |
| 1342 |
MPV_encode_end, |
| 1343 |
}; |
| 1344 |
|
| 1345 |
AVCodec h263_encoder = {
|
| 1346 |
"h263",
|
| 1347 |
CODEC_TYPE_VIDEO, |
| 1348 |
CODEC_ID_H263, |
| 1349 |
sizeof(MpegEncContext),
|
| 1350 |
MPV_encode_init, |
| 1351 |
MPV_encode_picture, |
| 1352 |
MPV_encode_end, |
| 1353 |
}; |
| 1354 |
|
| 1355 |
AVCodec h263p_encoder = {
|
| 1356 |
"h263p",
|
| 1357 |
CODEC_TYPE_VIDEO, |
| 1358 |
CODEC_ID_H263P, |
| 1359 |
sizeof(MpegEncContext),
|
| 1360 |
MPV_encode_init, |
| 1361 |
MPV_encode_picture, |
| 1362 |
MPV_encode_end, |
| 1363 |
}; |
| 1364 |
|
| 1365 |
AVCodec rv10_encoder = {
|
| 1366 |
"rv10",
|
| 1367 |
CODEC_TYPE_VIDEO, |
| 1368 |
CODEC_ID_RV10, |
| 1369 |
sizeof(MpegEncContext),
|
| 1370 |
MPV_encode_init, |
| 1371 |
MPV_encode_picture, |
| 1372 |
MPV_encode_end, |
| 1373 |
}; |
| 1374 |
|
| 1375 |
AVCodec mjpeg_encoder = {
|
| 1376 |
"mjpeg",
|
| 1377 |
CODEC_TYPE_VIDEO, |
| 1378 |
CODEC_ID_MJPEG, |
| 1379 |
sizeof(MpegEncContext),
|
| 1380 |
MPV_encode_init, |
| 1381 |
MPV_encode_picture, |
| 1382 |
MPV_encode_end, |
| 1383 |
}; |
| 1384 |
|
| 1385 |
AVCodec mpeg4_encoder = {
|
| 1386 |
"mpeg4",
|
| 1387 |
CODEC_TYPE_VIDEO, |
| 1388 |
CODEC_ID_MPEG4, |
| 1389 |
sizeof(MpegEncContext),
|
| 1390 |
MPV_encode_init, |
| 1391 |
MPV_encode_picture, |
| 1392 |
MPV_encode_end, |
| 1393 |
}; |
| 1394 |
|
| 1395 |
AVCodec msmpeg4_encoder = {
|
| 1396 |
"msmpeg4",
|
| 1397 |
CODEC_TYPE_VIDEO, |
| 1398 |
CODEC_ID_MSMPEG4, |
| 1399 |
sizeof(MpegEncContext),
|
| 1400 |
MPV_encode_init, |
| 1401 |
MPV_encode_picture, |
| 1402 |
MPV_encode_end, |
| 1403 |
}; |