DSPContext dsp;
int zeros; /**< number of consecutive zero bytes encountered */
int zeros_rem; /**< number of zero bytes remaining to output */
+ uint8_t *rgb_planes;
+ int rgb_stride;
} LagarithContext;
/**
AVFrame *const p = &l->picture;
uint8_t frametype = 0;
uint32_t offset_gu = 0, offset_bv = 0, offset_ry = 9;
+ int offs[4];
+ uint8_t *srcs[4], *dst;
+ int i, j, planes = 3;
AVFrame *picture = data;
offset_bv = AV_RL32(buf + 5);
switch (frametype) {
+ case FRAME_SOLID_RGBA:
+ avctx->pix_fmt = PIX_FMT_RGB32;
+
+ if (avctx->get_buffer(avctx, p) < 0) {
+ av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+ return -1;
+ }
+
+ dst = p->data[0];
+ for (j = 0; j < avctx->height; j++) {
+ for (i = 0; i < avctx->width; i++)
+ AV_WN32(dst + i * 4, offset_gu);
+ dst += p->linesize[0];
+ }
+ break;
+ case FRAME_ARITH_RGBA:
+ avctx->pix_fmt = PIX_FMT_RGB32;
+ planes = 4;
+ offset_ry += 4;
+ offs[3] = AV_RL32(buf + 9);
+ case FRAME_ARITH_RGB24:
+ if (frametype == FRAME_ARITH_RGB24)
+ avctx->pix_fmt = PIX_FMT_RGB24;
+
+ if (avctx->get_buffer(avctx, p) < 0) {
+ av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+ return -1;
+ }
+
+ offs[0] = offset_bv;
+ offs[1] = offset_gu;
+ offs[2] = offset_ry;
+
+ if (!l->rgb_planes) {
+ l->rgb_stride = FFALIGN(avctx->width, 16);
+ l->rgb_planes = av_malloc(l->rgb_stride * avctx->height * planes);
+ if (!l->rgb_planes) {
+ av_log(avctx, AV_LOG_ERROR, "cannot allocate temporary buffer\n");
+ return AVERROR(ENOMEM);
+ }
+ }
+ for (i = 0; i < planes; i++)
+ srcs[i] = l->rgb_planes + (i + 1) * l->rgb_stride * avctx->height - l->rgb_stride;
+ for (i = 0; i < planes; i++)
+ lag_decode_arith_plane(l, srcs[i],
+ avctx->width, avctx->height,
+ -l->rgb_stride, buf + offs[i],
+ buf_size);
+ dst = p->data[0];
+ for (i = 0; i < planes; i++)
+ srcs[i] = l->rgb_planes + i * l->rgb_stride * avctx->height;
+ for (j = 0; j < avctx->height; j++) {
+ for (i = 0; i < avctx->width; i++) {
+ uint8_t r, g, b, a;
+ r = srcs[0][i];
+ g = srcs[1][i];
+ b = srcs[2][i];
+ r += g;
+ b += g;
+ if (frametype == FRAME_ARITH_RGBA) {
+ a = srcs[3][i];
+ AV_WN32(dst + i * 4, MKBETAG(a, r, g, b));
+ } else {
+ dst[i * 3 + 0] = r;
+ dst[i * 3 + 1] = g;
+ dst[i * 3 + 2] = b;
+ }
+ }
+ dst += p->linesize[0];
+ for (i = 0; i < planes; i++)
+ srcs[i] += l->rgb_stride;
+ }
+ break;
case FRAME_ARITH_YV12:
avctx->pix_fmt = PIX_FMT_YUV420P;
if (l->picture.data[0])
avctx->release_buffer(avctx, &l->picture);
+ av_freep(&l->rgb_planes);
return 0;
}