patch by Vitor vitor1001 gmail moc original thread: [FFmpeg-devel] [PATCH] RoQ video encoder, take 2 date: 05/27/2007 12:21 PM Originally committed as revision 9149 to svn://svn.ffmpeg.org/ffmpeg/trunkpull/126/head
Vitor Sessak
18 years ago
committed by
Benoit Fouet
parent
7978debdc2
commit
55c970e349
4 changed files with 304 additions and 243 deletions
@ -0,0 +1,69 @@ |
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/*
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* Copyright (C) 2003 the ffmpeg project |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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* |
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*/ |
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#include "avcodec.h" |
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#include "dsputil.h" |
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typedef struct { |
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unsigned char y[4]; |
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unsigned char u, v; |
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} roq_cell; |
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typedef struct { |
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int idx[4]; |
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} roq_qcell; |
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typedef struct RoqContext { |
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AVCodecContext *avctx; |
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DSPContext dsp; |
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AVFrame frames[2]; |
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AVFrame *last_frame; |
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AVFrame *current_frame; |
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int first_frame; |
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int y_stride; |
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int c_stride; |
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roq_cell cells[256]; |
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roq_qcell qcells[256]; |
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unsigned char *buf; |
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int size; |
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} RoqContext; |
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#define RoQ_INFO 0x1001 |
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#define RoQ_QUAD_CODEBOOK 0x1002 |
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#define RoQ_QUAD_VQ 0x1011 |
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#define RoQ_SOUND_MONO 0x1020 |
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#define RoQ_SOUND_STEREO 0x1021 |
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#define RoQ_ID_MOT 0x00 |
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#define RoQ_ID_FCC 0x01 |
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#define RoQ_ID_SLD 0x02 |
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#define RoQ_ID_CCC 0x03 |
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void ff_apply_vector_2x2(RoqContext *ri, int x, int y, roq_cell *cell); |
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void ff_apply_vector_4x4(RoqContext *ri, int x, int y, roq_cell *cell); |
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void ff_apply_motion_4x4(RoqContext *ri, int x, int y, int deltax, int deltay); |
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void ff_apply_motion_8x8(RoqContext *ri, int x, int y, int deltax, int deltay); |
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@ -0,0 +1,232 @@ |
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/*
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* Copyright (C) 2003 the ffmpeg project |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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* |
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*/ |
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/**
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* @file roqvideodec.c |
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* Id RoQ Video Decoder by Dr. Tim Ferguson |
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* For more information about the Id RoQ format, visit: |
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* http://www.csse.monash.edu.au/~timf/
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*/ |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <unistd.h> |
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#include "avcodec.h" |
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#include "bytestream.h" |
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#include "dsputil.h" |
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#include "roqvideo.h" |
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#define avg2(a,b) av_clip_uint8(((int)(a)+(int)(b)+1)>>1) |
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#define avg4(a,b,c,d) av_clip_uint8(((int)(a)+(int)(b)+(int)(c)+(int)(d)+2)>>2) |
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#define get_byte(in_buffer) *(in_buffer++) |
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static void roqvideo_decode_frame(RoqContext *ri) |
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{ |
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unsigned int chunk_id = 0, chunk_arg = 0; |
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unsigned long chunk_size = 0; |
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int i, j, k, nv1, nv2, vqflg = 0, vqflg_pos = -1; |
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int vqid, bpos, xpos, ypos, xp, yp, x, y, mx, my; |
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int frame_stats[2][4] = {{0},{0}}; |
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roq_qcell *qcell; |
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unsigned char *buf = ri->buf; |
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unsigned char *buf_end = ri->buf + ri->size; |
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while (buf < buf_end) { |
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chunk_id = bytestream_get_le16(&buf); |
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chunk_size = bytestream_get_le32(&buf); |
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chunk_arg = bytestream_get_le16(&buf); |
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if(chunk_id == RoQ_QUAD_VQ) |
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break; |
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if(chunk_id == RoQ_QUAD_CODEBOOK) { |
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if((nv1 = chunk_arg >> 8) == 0) |
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nv1 = 256; |
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if((nv2 = chunk_arg & 0xff) == 0 && nv1 * 6 < chunk_size) |
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nv2 = 256; |
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for(i = 0; i < nv1; i++) { |
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ri->cells[i].y[0] = get_byte(buf); |
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ri->cells[i].y[1] = get_byte(buf); |
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ri->cells[i].y[2] = get_byte(buf); |
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ri->cells[i].y[3] = get_byte(buf); |
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ri->cells[i].u = get_byte(buf); |
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ri->cells[i].v = get_byte(buf); |
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} |
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for(i = 0; i < nv2; i++) |
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for(j = 0; j < 4; j++) |
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ri->qcells[i].idx[j] = get_byte(buf); |
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} |
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} |
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bpos = xpos = ypos = 0; |
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while(bpos < chunk_size) { |
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for (yp = ypos; yp < ypos + 16; yp += 8) |
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for (xp = xpos; xp < xpos + 16; xp += 8) { |
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if (vqflg_pos < 0) { |
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vqflg = buf[bpos++]; vqflg |= (buf[bpos++] << 8); |
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vqflg_pos = 7; |
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} |
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vqid = (vqflg >> (vqflg_pos * 2)) & 0x3; |
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frame_stats[0][vqid]++; |
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vqflg_pos--; |
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switch(vqid) { |
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case RoQ_ID_MOT: |
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ff_apply_motion_8x8(ri, xp, yp, 0, 0); |
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break; |
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case RoQ_ID_FCC: |
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mx = 8 - (buf[bpos] >> 4) - ((signed char) (chunk_arg >> 8)); |
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my = 8 - (buf[bpos++] & 0xf) - ((signed char) chunk_arg); |
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ff_apply_motion_8x8(ri, xp, yp, mx, my); |
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break; |
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case RoQ_ID_SLD: |
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qcell = ri->qcells + buf[bpos++]; |
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ff_apply_vector_4x4(ri, xp, yp, ri->cells + qcell->idx[0]); |
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ff_apply_vector_4x4(ri, xp+4, yp, ri->cells + qcell->idx[1]); |
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ff_apply_vector_4x4(ri, xp, yp+4, ri->cells + qcell->idx[2]); |
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ff_apply_vector_4x4(ri, xp+4, yp+4, ri->cells + qcell->idx[3]); |
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break; |
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case RoQ_ID_CCC: |
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for (k = 0; k < 4; k++) { |
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x = xp; y = yp; |
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if(k & 0x01) x += 4; |
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if(k & 0x02) y += 4; |
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if (vqflg_pos < 0) { |
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vqflg = buf[bpos++]; |
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vqflg |= (buf[bpos++] << 8); |
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vqflg_pos = 7; |
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} |
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vqid = (vqflg >> (vqflg_pos * 2)) & 0x3; |
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frame_stats[1][vqid]++; |
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vqflg_pos--; |
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switch(vqid) { |
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case RoQ_ID_MOT: |
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ff_apply_motion_4x4(ri, x, y, 0, 0); |
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break; |
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case RoQ_ID_FCC: |
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mx = 8 - (buf[bpos] >> 4) - ((signed char) (chunk_arg >> 8)); |
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my = 8 - (buf[bpos++] & 0xf) - ((signed char) chunk_arg); |
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ff_apply_motion_4x4(ri, x, y, mx, my); |
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break; |
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case RoQ_ID_SLD: |
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qcell = ri->qcells + buf[bpos++]; |
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ff_apply_vector_2x2(ri, x, y, ri->cells + qcell->idx[0]); |
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ff_apply_vector_2x2(ri, x+2, y, ri->cells + qcell->idx[1]); |
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ff_apply_vector_2x2(ri, x, y+2, ri->cells + qcell->idx[2]); |
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ff_apply_vector_2x2(ri, x+2, y+2, ri->cells + qcell->idx[3]); |
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break; |
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case RoQ_ID_CCC: |
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ff_apply_vector_2x2(ri, x, y, ri->cells + buf[bpos]); |
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ff_apply_vector_2x2(ri, x+2, y, ri->cells + buf[bpos+1]); |
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ff_apply_vector_2x2(ri, x, y+2, ri->cells + buf[bpos+2]); |
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ff_apply_vector_2x2(ri, x+2, y+2, ri->cells + buf[bpos+3]); |
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bpos += 4; |
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break; |
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} |
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} |
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break; |
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default: |
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av_log(ri->avctx, AV_LOG_ERROR, "Unknown vq code: %d\n", vqid); |
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} |
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} |
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xpos += 16; |
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if (xpos >= ri->avctx->width) { |
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xpos -= ri->avctx->width; |
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ypos += 16; |
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} |
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if(ypos >= ri->avctx->height) |
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break; |
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} |
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} |
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static int roq_decode_init(AVCodecContext *avctx) |
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{ |
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RoqContext *s = avctx->priv_data; |
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s->avctx = avctx; |
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s->first_frame = 1; |
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s->last_frame = &s->frames[0]; |
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s->current_frame = &s->frames[1]; |
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avctx->pix_fmt = PIX_FMT_YUV420P; |
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dsputil_init(&s->dsp, avctx); |
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return 0; |
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} |
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static int roq_decode_frame(AVCodecContext *avctx, |
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void *data, int *data_size, |
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uint8_t *buf, int buf_size) |
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{ |
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RoqContext *s = avctx->priv_data; |
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if (avctx->get_buffer(avctx, s->current_frame)) { |
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av_log(avctx, AV_LOG_ERROR, " RoQ: get_buffer() failed\n"); |
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return -1; |
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} |
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s->y_stride = s->current_frame->linesize[0]; |
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s->c_stride = s->current_frame->linesize[1]; |
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s->buf = buf; |
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s->size = buf_size; |
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roqvideo_decode_frame(s); |
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/* release the last frame if it is allocated */ |
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if (s->first_frame) |
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s->first_frame = 0; |
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else |
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avctx->release_buffer(avctx, s->last_frame); |
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*data_size = sizeof(AVFrame); |
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*(AVFrame*)data = *s->current_frame; |
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/* shuffle frames */ |
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FFSWAP(AVFrame *, s->current_frame, s->last_frame); |
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return buf_size; |
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} |
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static int roq_decode_end(AVCodecContext *avctx) |
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{ |
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RoqContext *s = avctx->priv_data; |
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/* release the last frame */ |
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if (s->last_frame->data[0]) |
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avctx->release_buffer(avctx, s->last_frame); |
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return 0; |
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} |
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AVCodec roq_decoder = { |
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"roqvideo", |
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CODEC_TYPE_VIDEO, |
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CODEC_ID_ROQ, |
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sizeof(RoqContext), |
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roq_decode_init, |
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NULL, |
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roq_decode_end, |
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roq_decode_frame, |
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CODEC_CAP_DR1, |
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}; |
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