* Kega Game Video decoder
*/
+#include "libavutil/common.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/imgutils.h"
#include "avcodec.h"
+#include "internal.h"
typedef struct {
AVCodecContext *avctx;
- AVFrame prev, cur;
+ uint16_t *frame_buffer;
+ uint16_t *last_frame_buffer;
} KgvContext;
static void decode_flush(AVCodecContext *avctx)
{
KgvContext * const c = avctx->priv_data;
- if (c->prev.data[0])
- avctx->release_buffer(avctx, &c->prev);
+ av_freep(&c->frame_buffer);
+ av_freep(&c->last_frame_buffer);
}
-static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt)
+static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
+ AVPacket *avpkt)
{
+ AVFrame *frame = data;
const uint8_t *buf = avpkt->data;
const uint8_t *buf_end = buf + avpkt->size;
KgvContext * const c = avctx->priv_data;
int w, h, i, res;
if (avpkt->size < 2)
- return -1;
+ return AVERROR_INVALIDDATA;
w = (buf[0] + 1) * 8;
h = (buf[1] + 1) * 8;
buf += 2;
- if (av_image_check_size(w, h, 0, avctx))
- return -1;
+ if (w != avctx->width || h != avctx->height) {
+ av_freep(&c->frame_buffer);
+ av_freep(&c->last_frame_buffer);
+ if ((res = ff_set_dimensions(avctx, w, h)) < 0)
+ return res;
+ }
- if (w != avctx->width || h != avctx->height)
- avcodec_set_dimensions(avctx, w, h);
+ if (!c->frame_buffer) {
+ c->frame_buffer = av_mallocz(avctx->width * avctx->height * 2);
+ c->last_frame_buffer = av_mallocz(avctx->width * avctx->height * 2);
+ if (!c->frame_buffer || !c->last_frame_buffer) {
+ decode_flush(avctx);
+ return AVERROR(ENOMEM);
+ }
+ }
maxcnt = w * h;
- c->cur.reference = 3;
- if ((res = avctx->get_buffer(avctx, &c->cur)) < 0)
+ if ((res = ff_get_buffer(avctx, frame, 0)) < 0)
return res;
- out = (uint16_t *) c->cur.data[0];
- if (c->prev.data[0]) {
- prev = (uint16_t *) c->prev.data[0];
- } else {
- prev = NULL;
- }
+ out = c->frame_buffer;
+ prev = c->last_frame_buffer;
for (i = 0; i < 8; i++)
offsets[i] = -1;
if (outcnt - maxcnt)
av_log(avctx, AV_LOG_DEBUG, "frame finished with %d diff\n", outcnt - maxcnt);
- *data_size = sizeof(AVFrame);
- *(AVFrame*)data = c->cur;
+ av_image_copy_plane(frame->data[0], frame->linesize[0],
+ (const uint8_t*)c->frame_buffer, avctx->width * 2,
+ avctx->width * 2, avctx->height);
+ FFSWAP(uint16_t *, c->frame_buffer, c->last_frame_buffer);
- if (c->prev.data[0])
- avctx->release_buffer(avctx, &c->prev);
- FFSWAP(AVFrame, c->cur, c->prev);
+ *got_frame = 1;
return avpkt->size;
}
KgvContext * const c = avctx->priv_data;
c->avctx = avctx;
- avctx->pix_fmt = PIX_FMT_RGB555;
- avctx->flags |= CODEC_FLAG_EMU_EDGE;
+ avctx->pix_fmt = AV_PIX_FMT_RGB555;
return 0;
}
AVCodec ff_kgv1_decoder = {
.name = "kgv1",
+ .long_name = NULL_IF_CONFIG_SMALL("Kega Game Video"),
.type = AVMEDIA_TYPE_VIDEO,
- .id = CODEC_ID_KGV1,
+ .id = AV_CODEC_ID_KGV1,
.priv_data_size = sizeof(KgvContext),
.init = decode_init,
.close = decode_end,
.decode = decode_frame,
.flush = decode_flush,
- .long_name = NULL_IF_CONFIG_SMALL("Kega Game Video"),
+ .capabilities = CODEC_CAP_DR1,
};