static int yop_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
AVPacket *avpkt)
{
YopDecContext *s = avctx->priv_data;
int tag, firstcolor, is_odd_frame;
int ret, i;
uint32_t *palette;
if (s->frame.data[0])
avctx->release_buffer(avctx, &s->frame);
ret = avctx->get_buffer(avctx, &s->frame);
if (ret < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return ret;
}
s->frame.linesize[0] = avctx->width;
s->dstbuf = s->frame.data[0];
s->dstptr = s->frame.data[0];
s->srcptr = avpkt->data + 4;
s->row_pos = 0;
s->low_nibble = NULL;
is_odd_frame = avpkt->data[0];
firstcolor = s->first_color[is_odd_frame];
palette = (uint32_t *)s->frame.data[1];
for (i = 0; i < s->num_pal_colors; i++, s->srcptr += 3)
palette[i + firstcolor] = (s->srcptr[0] << 18) |
(s->srcptr[1] << 10) |
(s->srcptr[2] << 2);
s->frame.palette_has_changed = 1;
while (s->dstptr - s->dstbuf <
avctx->width * avctx->height &&
s->srcptr - avpkt->data < avpkt->size) {
tag = yop_get_next_nibble(s);
if (tag != 0xf) {
yop_paint_block(s, tag);
}else {
tag = yop_get_next_nibble(s);
ret = yop_copy_previous_block(s, tag);
if (ret < 0) {
avctx->release_buffer(avctx, &s->frame);
return ret;
}
}
yop_next_macroblock(s);
}
*data_size = sizeof(AVFrame);
*(AVFrame *) data = s->frame;
return avpkt->size;
}
static int yop_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
AVPacket *avpkt)
{
YopDecContext *s = avctx->priv_data;
int tag, firstcolor, is_odd_frame;
int ret, i, x, y;
uint32_t *palette;
if (avpkt->size < 4 + 3 * s->num_pal_colors) {
av_log(avctx, AV_LOG_ERROR, "Packet too small.\n");
return AVERROR_INVALIDDATA;
}
if (s->frame.data[0])
avctx->release_buffer(avctx, &s->frame);
ret = ff_get_buffer(avctx, &s->frame);
if (ret < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return ret;
}
if (!avctx->frame_number)
memset(s->frame.data[1], 0, AVPALETTE_SIZE);
s->dstbuf = s->frame.data[0];
s->dstptr = s->frame.data[0];
s->srcptr = avpkt->data + 4;
s->src_end = avpkt->data + avpkt->size;
s->low_nibble = NULL;
is_odd_frame = avpkt->data[0];
firstcolor = s->first_color[is_odd_frame];
palette = (uint32_t *)s->frame.data[1];
for (i = 0; i < s->num_pal_colors; i++, s->srcptr += 3)
palette[i + firstcolor] = (s->srcptr[0] << 18) |
(s->srcptr[1] << 10) |
(s->srcptr[2] << 2);
s->frame.palette_has_changed = 1;
for (y = 0; y < avctx->height; y += 2) {
for (x = 0; x < avctx->width; x += 2) {
if (s->srcptr - avpkt->data >= avpkt->size) {
av_log(avctx, AV_LOG_ERROR, "Packet too small.\n");
return AVERROR_INVALIDDATA;
}
tag = yop_get_next_nibble(s);
if (tag != 0xf) {
ret = yop_paint_block(s, tag);
if (ret < 0)
return ret;
} else {
tag = yop_get_next_nibble(s);
ret = yop_copy_previous_block(s, tag);
if (ret < 0) {
avctx->release_buffer(avctx, &s->frame);
return ret;
}
}
s->dstptr += 2;
}
s->dstptr += 2*s->frame.linesize[0] - x;
}
*got_frame = 1;
*(AVFrame *) data = s->frame;
return avpkt->size;
}
