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Diffstat (limited to 'contrib/ffmpeg/libavcodec/roqvideo.c')
-rw-r--r--contrib/ffmpeg/libavcodec/roqvideo.c477
1 files changed, 477 insertions, 0 deletions
diff --git a/contrib/ffmpeg/libavcodec/roqvideo.c b/contrib/ffmpeg/libavcodec/roqvideo.c
new file mode 100644
index 000000000..2a9aa6242
--- /dev/null
+++ b/contrib/ffmpeg/libavcodec/roqvideo.c
@@ -0,0 +1,477 @@
+/*
+ * Copyright (C) 2003 the ffmpeg project
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ */
+
+/**
+ * @file roqvideo.c
+ * Id RoQ Video Decoder by Dr. Tim Ferguson
+ * For more information about the Id RoQ format, visit:
+ * http://www.csse.monash.edu.au/~timf/
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "common.h"
+#include "avcodec.h"
+#include "dsputil.h"
+
+typedef struct {
+ unsigned char y0, y1, y2, y3, u, v;
+} roq_cell;
+
+typedef struct {
+ int idx[4];
+} roq_qcell;
+
+static int uiclip[1024], *uiclp; /* clipping table */
+#define avg2(a,b) uiclp[(((int)(a)+(int)(b)+1)>>1)]
+#define avg4(a,b,c,d) uiclp[(((int)(a)+(int)(b)+(int)(c)+(int)(d)+2)>>2)]
+
+typedef struct RoqContext {
+
+ AVCodecContext *avctx;
+ DSPContext dsp;
+ AVFrame frames[2];
+ AVFrame *last_frame;
+ AVFrame *current_frame;
+ int first_frame;
+ int y_stride;
+ int c_stride;
+
+ roq_cell cells[256];
+ roq_qcell qcells[256];
+
+ unsigned char *buf;
+ int size;
+
+} RoqContext;
+
+#define RoQ_INFO 0x1001
+#define RoQ_QUAD_CODEBOOK 0x1002
+#define RoQ_QUAD_VQ 0x1011
+#define RoQ_SOUND_MONO 0x1020
+#define RoQ_SOUND_STEREO 0x1021
+
+#define RoQ_ID_MOT 0x00
+#define RoQ_ID_FCC 0x01
+#define RoQ_ID_SLD 0x02
+#define RoQ_ID_CCC 0x03
+
+#define get_byte(in_buffer) *(in_buffer++)
+#define get_word(in_buffer) ((unsigned short)(in_buffer += 2, \
+ (in_buffer[-1] << 8 | in_buffer[-2])))
+#define get_long(in_buffer) ((unsigned long)(in_buffer += 4, \
+ (in_buffer[-1] << 24 | in_buffer[-2] << 16 | in_buffer[-3] << 8 | in_buffer[-4])))
+
+
+static void apply_vector_2x2(RoqContext *ri, int x, int y, roq_cell *cell)
+{
+ unsigned char *yptr;
+
+ yptr = ri->current_frame->data[0] + (y * ri->y_stride) + x;
+ *yptr++ = cell->y0;
+ *yptr++ = cell->y1;
+ yptr += (ri->y_stride - 2);
+ *yptr++ = cell->y2;
+ *yptr++ = cell->y3;
+ ri->current_frame->data[1][(y/2) * (ri->c_stride) + x/2] = cell->u;
+ ri->current_frame->data[2][(y/2) * (ri->c_stride) + x/2] = cell->v;
+}
+
+static void apply_vector_4x4(RoqContext *ri, int x, int y, roq_cell *cell)
+{
+ unsigned long row_inc, c_row_inc;
+ register unsigned char y0, y1, u, v;
+ unsigned char *yptr, *uptr, *vptr;
+
+ yptr = ri->current_frame->data[0] + (y * ri->y_stride) + x;
+ uptr = ri->current_frame->data[1] + (y/2) * (ri->c_stride) + x/2;
+ vptr = ri->current_frame->data[2] + (y/2) * (ri->c_stride) + x/2;
+
+ row_inc = ri->y_stride - 4;
+ c_row_inc = (ri->c_stride) - 2;
+ *yptr++ = y0 = cell->y0; *uptr++ = u = cell->u; *vptr++ = v = cell->v;
+ *yptr++ = y0;
+ *yptr++ = y1 = cell->y1; *uptr++ = u; *vptr++ = v;
+ *yptr++ = y1;
+
+ yptr += row_inc;
+
+ *yptr++ = y0;
+ *yptr++ = y0;
+ *yptr++ = y1;
+ *yptr++ = y1;
+
+ yptr += row_inc; uptr += c_row_inc; vptr += c_row_inc;
+
+ *yptr++ = y0 = cell->y2; *uptr++ = u; *vptr++ = v;
+ *yptr++ = y0;
+ *yptr++ = y1 = cell->y3; *uptr++ = u; *vptr++ = v;
+ *yptr++ = y1;
+
+ yptr += row_inc;
+
+ *yptr++ = y0;
+ *yptr++ = y0;
+ *yptr++ = y1;
+ *yptr++ = y1;
+}
+
+static void apply_motion_4x4(RoqContext *ri, int x, int y, unsigned char mv,
+ signed char mean_x, signed char mean_y)
+{
+ int i, hw, mx, my;
+ unsigned char *pa, *pb;
+
+ mx = x + 8 - (mv >> 4) - mean_x;
+ my = y + 8 - (mv & 0xf) - mean_y;
+
+ /* check MV against frame boundaries */
+ if ((mx < 0) || (mx > ri->avctx->width - 4) ||
+ (my < 0) || (my > ri->avctx->height - 4)) {
+ av_log(ri->avctx, AV_LOG_ERROR, "motion vector out of bounds: MV = (%d, %d), boundaries = (0, 0, %d, %d)\n",
+ mx, my, ri->avctx->width, ri->avctx->height);
+ return;
+ }
+
+ pa = ri->current_frame->data[0] + (y * ri->y_stride) + x;
+ pb = ri->last_frame->data[0] + (my * ri->y_stride) + mx;
+ for(i = 0; i < 4; i++) {
+ pa[0] = pb[0];
+ pa[1] = pb[1];
+ pa[2] = pb[2];
+ pa[3] = pb[3];
+ pa += ri->y_stride;
+ pb += ri->y_stride;
+ }
+
+ hw = ri->y_stride/2;
+ pa = ri->current_frame->data[1] + (y * ri->y_stride)/4 + x/2;
+ pb = ri->last_frame->data[1] + (my/2) * (ri->y_stride/2) + (mx + 1)/2;
+
+ for(i = 0; i < 2; i++) {
+ switch(((my & 0x01) << 1) | (mx & 0x01)) {
+
+ case 0:
+ pa[0] = pb[0];
+ pa[1] = pb[1];
+ pa[hw] = pb[hw];
+ pa[hw+1] = pb[hw+1];
+ break;
+
+ case 1:
+ pa[0] = avg2(pb[0], pb[1]);
+ pa[1] = avg2(pb[1], pb[2]);
+ pa[hw] = avg2(pb[hw], pb[hw+1]);
+ pa[hw+1] = avg2(pb[hw+1], pb[hw+2]);
+ break;
+
+ case 2:
+ pa[0] = avg2(pb[0], pb[hw]);
+ pa[1] = avg2(pb[1], pb[hw+1]);
+ pa[hw] = avg2(pb[hw], pb[hw*2]);
+ pa[hw+1] = avg2(pb[hw+1], pb[(hw*2)+1]);
+ break;
+
+ case 3:
+ pa[0] = avg4(pb[0], pb[1], pb[hw], pb[hw+1]);
+ pa[1] = avg4(pb[1], pb[2], pb[hw+1], pb[hw+2]);
+ pa[hw] = avg4(pb[hw], pb[hw+1], pb[hw*2], pb[(hw*2)+1]);
+ pa[hw+1] = avg4(pb[hw+1], pb[hw+2], pb[(hw*2)+1], pb[(hw*2)+1]);
+ break;
+ }
+
+ pa = ri->current_frame->data[2] + (y * ri->y_stride)/4 + x/2;
+ pb = ri->last_frame->data[2] + (my/2) * (ri->y_stride/2) + (mx + 1)/2;
+ }
+}
+
+static void apply_motion_8x8(RoqContext *ri, int x, int y,
+ unsigned char mv, signed char mean_x, signed char mean_y)
+{
+ int mx, my, i, j, hw;
+ unsigned char *pa, *pb;
+
+ mx = x + 8 - (mv >> 4) - mean_x;
+ my = y + 8 - (mv & 0xf) - mean_y;
+
+ /* check MV against frame boundaries */
+ if ((mx < 0) || (mx > ri->avctx->width - 8) ||
+ (my < 0) || (my > ri->avctx->height - 8)) {
+ av_log(ri->avctx, AV_LOG_ERROR, "motion vector out of bounds: MV = (%d, %d), boundaries = (0, 0, %d, %d)\n",
+ mx, my, ri->avctx->width, ri->avctx->height);
+ return;
+ }
+
+ pa = ri->current_frame->data[0] + (y * ri->y_stride) + x;
+ pb = ri->last_frame->data[0] + (my * ri->y_stride) + mx;
+ for(i = 0; i < 8; i++) {
+ pa[0] = pb[0];
+ pa[1] = pb[1];
+ pa[2] = pb[2];
+ pa[3] = pb[3];
+ pa[4] = pb[4];
+ pa[5] = pb[5];
+ pa[6] = pb[6];
+ pa[7] = pb[7];
+ pa += ri->y_stride;
+ pb += ri->y_stride;
+ }
+
+ hw = ri->c_stride;
+ pa = ri->current_frame->data[1] + (y * ri->y_stride)/4 + x/2;
+ pb = ri->last_frame->data[1] + (my/2) * (ri->y_stride/2) + (mx + 1)/2;
+ for(j = 0; j < 2; j++) {
+ for(i = 0; i < 4; i++) {
+ switch(((my & 0x01) << 1) | (mx & 0x01)) {
+
+ case 0:
+ pa[0] = pb[0];
+ pa[1] = pb[1];
+ pa[2] = pb[2];
+ pa[3] = pb[3];
+ break;
+
+ case 1:
+ pa[0] = avg2(pb[0], pb[1]);
+ pa[1] = avg2(pb[1], pb[2]);
+ pa[2] = avg2(pb[2], pb[3]);
+ pa[3] = avg2(pb[3], pb[4]);
+ break;
+
+ case 2:
+ pa[0] = avg2(pb[0], pb[hw]);
+ pa[1] = avg2(pb[1], pb[hw+1]);
+ pa[2] = avg2(pb[2], pb[hw+2]);
+ pa[3] = avg2(pb[3], pb[hw+3]);
+ break;
+
+ case 3:
+ pa[0] = avg4(pb[0], pb[1], pb[hw], pb[hw+1]);
+ pa[1] = avg4(pb[1], pb[2], pb[hw+1], pb[hw+2]);
+ pa[2] = avg4(pb[2], pb[3], pb[hw+2], pb[hw+3]);
+ pa[3] = avg4(pb[3], pb[4], pb[hw+3], pb[hw+4]);
+ break;
+ }
+ pa += ri->c_stride;
+ pb += ri->c_stride;
+ }
+
+ pa = ri->current_frame->data[2] + (y * ri->y_stride)/4 + x/2;
+ pb = ri->last_frame->data[2] + (my/2) * (ri->y_stride/2) + (mx + 1)/2;
+ }
+}
+
+static void roqvideo_decode_frame(RoqContext *ri)
+{
+ unsigned int chunk_id = 0, chunk_arg = 0;
+ unsigned long chunk_size = 0;
+ int i, j, k, nv1, nv2, vqflg = 0, vqflg_pos = -1;
+ int vqid, bpos, xpos, ypos, xp, yp, x, y;
+ int frame_stats[2][4] = {{0},{0}};
+ roq_qcell *qcell;
+ unsigned char *buf = ri->buf;
+ unsigned char *buf_end = ri->buf + ri->size;
+
+ while (buf < buf_end) {
+ chunk_id = get_word(buf);
+ chunk_size = get_long(buf);
+ chunk_arg = get_word(buf);
+
+ if(chunk_id == RoQ_QUAD_VQ)
+ break;
+ if(chunk_id == RoQ_QUAD_CODEBOOK) {
+ if((nv1 = chunk_arg >> 8) == 0)
+ nv1 = 256;
+ if((nv2 = chunk_arg & 0xff) == 0 && nv1 * 6 < chunk_size)
+ nv2 = 256;
+ for(i = 0; i < nv1; i++) {
+ ri->cells[i].y0 = get_byte(buf);
+ ri->cells[i].y1 = get_byte(buf);
+ ri->cells[i].y2 = get_byte(buf);
+ ri->cells[i].y3 = get_byte(buf);
+ ri->cells[i].u = get_byte(buf);
+ ri->cells[i].v = get_byte(buf);
+ }
+ for(i = 0; i < nv2; i++)
+ for(j = 0; j < 4; j++)
+ ri->qcells[i].idx[j] = get_byte(buf);
+ }
+ }
+
+ bpos = xpos = ypos = 0;
+ while(bpos < chunk_size) {
+ for (yp = ypos; yp < ypos + 16; yp += 8)
+ for (xp = xpos; xp < xpos + 16; xp += 8) {
+ if (vqflg_pos < 0) {
+ vqflg = buf[bpos++]; vqflg |= (buf[bpos++] << 8);
+ vqflg_pos = 7;
+ }
+ vqid = (vqflg >> (vqflg_pos * 2)) & 0x3;
+ frame_stats[0][vqid]++;
+ vqflg_pos--;
+
+ switch(vqid) {
+ case RoQ_ID_MOT:
+ apply_motion_8x8(ri, xp, yp, 0, 8, 8);
+ break;
+ case RoQ_ID_FCC:
+ apply_motion_8x8(ri, xp, yp, buf[bpos++], chunk_arg >> 8,
+ chunk_arg & 0xff);
+ break;
+ case RoQ_ID_SLD:
+ qcell = ri->qcells + buf[bpos++];
+ apply_vector_4x4(ri, xp, yp, ri->cells + qcell->idx[0]);
+ apply_vector_4x4(ri, xp+4, yp, ri->cells + qcell->idx[1]);
+ apply_vector_4x4(ri, xp, yp+4, ri->cells + qcell->idx[2]);
+ apply_vector_4x4(ri, xp+4, yp+4, ri->cells + qcell->idx[3]);
+ break;
+ case RoQ_ID_CCC:
+ for (k = 0; k < 4; k++) {
+ x = xp; y = yp;
+ if(k & 0x01) x += 4;
+ if(k & 0x02) y += 4;
+
+ if (vqflg_pos < 0) {
+ vqflg = buf[bpos++];
+ vqflg |= (buf[bpos++] << 8);
+ vqflg_pos = 7;
+ }
+ vqid = (vqflg >> (vqflg_pos * 2)) & 0x3;
+ frame_stats[1][vqid]++;
+ vqflg_pos--;
+ switch(vqid) {
+ case RoQ_ID_MOT:
+ apply_motion_4x4(ri, x, y, 0, 8, 8);
+ break;
+ case RoQ_ID_FCC:
+ apply_motion_4x4(ri, x, y, buf[bpos++],
+ chunk_arg >> 8, chunk_arg & 0xff);
+ break;
+ case RoQ_ID_SLD:
+ qcell = ri->qcells + buf[bpos++];
+ apply_vector_2x2(ri, x, y, ri->cells + qcell->idx[0]);
+ apply_vector_2x2(ri, x+2, y, ri->cells + qcell->idx[1]);
+ apply_vector_2x2(ri, x, y+2, ri->cells + qcell->idx[2]);
+ apply_vector_2x2(ri, x+2, y+2, ri->cells + qcell->idx[3]);
+ break;
+ case RoQ_ID_CCC:
+ apply_vector_2x2(ri, x, y, ri->cells + buf[bpos]);
+ apply_vector_2x2(ri, x+2, y, ri->cells + buf[bpos+1]);
+ apply_vector_2x2(ri, x, y+2, ri->cells + buf[bpos+2]);
+ apply_vector_2x2(ri, x+2, y+2, ri->cells + buf[bpos+3]);
+ bpos += 4;
+ break;
+ }
+ }
+ break;
+ default:
+ av_log(ri->avctx, AV_LOG_ERROR, "Unknown vq code: %d\n", vqid);
+ }
+ }
+
+ xpos += 16;
+ if (xpos >= ri->avctx->width) {
+ xpos -= ri->avctx->width;
+ ypos += 16;
+ }
+ if(ypos >= ri->avctx->height)
+ break;
+ }
+}
+
+
+static int roq_decode_init(AVCodecContext *avctx)
+{
+ RoqContext *s = avctx->priv_data;
+ int i;
+
+ s->avctx = avctx;
+ s->first_frame = 1;
+ s->last_frame = &s->frames[0];
+ s->current_frame = &s->frames[1];
+ avctx->pix_fmt = PIX_FMT_YUV420P;
+ avctx->has_b_frames = 0;
+ dsputil_init(&s->dsp, avctx);
+
+ uiclp = uiclip+512;
+ for(i = -512; i < 512; i++)
+ uiclp[i] = (i < 0 ? 0 : (i > 255 ? 255 : i));
+
+ return 0;
+}
+
+static int roq_decode_frame(AVCodecContext *avctx,
+ void *data, int *data_size,
+ uint8_t *buf, int buf_size)
+{
+ RoqContext *s = avctx->priv_data;
+
+ if (avctx->get_buffer(avctx, s->current_frame)) {
+ av_log(avctx, AV_LOG_ERROR, " RoQ: get_buffer() failed\n");
+ return -1;
+ }
+ s->y_stride = s->current_frame->linesize[0];
+ s->c_stride = s->current_frame->linesize[1];
+
+ s->buf = buf;
+ s->size = buf_size;
+ roqvideo_decode_frame(s);
+
+ /* release the last frame if it is allocated */
+ if (s->first_frame)
+ s->first_frame = 0;
+ else
+ avctx->release_buffer(avctx, s->last_frame);
+
+ *data_size = sizeof(AVFrame);
+ *(AVFrame*)data = *s->current_frame;
+
+ /* shuffle frames */
+ FFSWAP(AVFrame *, s->current_frame, s->last_frame);
+
+ return buf_size;
+}
+
+static int roq_decode_end(AVCodecContext *avctx)
+{
+ RoqContext *s = avctx->priv_data;
+
+ /* release the last frame */
+ if (s->last_frame->data[0])
+ avctx->release_buffer(avctx, s->last_frame);
+
+ return 0;
+}
+
+AVCodec roq_decoder = {
+ "roqvideo",
+ CODEC_TYPE_VIDEO,
+ CODEC_ID_ROQ,
+ sizeof(RoqContext),
+ roq_decode_init,
+ NULL,
+ roq_decode_end,
+ roq_decode_frame,
+ CODEC_CAP_DR1,
+};
generated by cgit v1.2.3 (git 2.25.1) at 2025-04-26 18:50:28 +0000