*/
#include "avcodec.h"
-#include "dsputil.h"
#include "internal.h"
#include "libavutil/internal.h"
typedef struct VCR1Context {
- AVFrame picture;
int delta[16];
int offset[4];
} VCR1Context;
-static av_cold int vcr1_common_init(AVCodecContext *avctx)
-{
- VCR1Context *const a = avctx->priv_data;
-
- avctx->coded_frame = &a->picture;
-
- return 0;
-}
-
static av_cold int vcr1_decode_init(AVCodecContext *avctx)
{
- vcr1_common_init(avctx);
-
avctx->pix_fmt = AV_PIX_FMT_YUV410P;
- return 0;
-}
-
-static av_cold int vcr1_decode_end(AVCodecContext *avctx)
-{
- VCR1Context *s = avctx->priv_data;
-
- if (s->picture.data[0])
- avctx->release_buffer(avctx, &s->picture);
+ if (avctx->width & 7) {
+ av_log(avctx, AV_LOG_ERROR, "Width %d is not divisble by 8.\n", avctx->width);
+ return AVERROR_INVALIDDATA;
+ }
return 0;
}
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
VCR1Context *const a = avctx->priv_data;
- AVFrame *picture = data;
- AVFrame *const p = &a->picture;
+ AVFrame *const p = data;
const uint8_t *bytestream = buf;
- int i, x, y;
+ int i, x, y, ret;
- if (p->data[0])
- avctx->release_buffer(avctx, p);
-
- p->reference = 0;
- if (ff_get_buffer(avctx, p) < 0) {
+ if ((ret = ff_get_buffer(avctx, p, 0)) < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
- return -1;
+ return ret;
}
p->pict_type = AV_PICTURE_TYPE_I;
p->key_frame = 1;
+ if (buf_size < 32)
+ goto packet_small;
+
for (i = 0; i < 16; i++) {
a->delta[i] = *bytestream++;
bytestream++;
+ buf_size--;
}
for (y = 0; y < avctx->height; y++) {
int offset;
- uint8_t *luma = &a->picture.data[0][y * a->picture.linesize[0]];
+ uint8_t *luma = &p->data[0][y * p->linesize[0]];
if ((y & 3) == 0) {
- uint8_t *cb = &a->picture.data[1][(y >> 2) * a->picture.linesize[1]];
- uint8_t *cr = &a->picture.data[2][(y >> 2) * a->picture.linesize[2]];
+ uint8_t *cb = &p->data[1][(y >> 2) * p->linesize[1]];
+ uint8_t *cr = &p->data[2][(y >> 2) * p->linesize[2]];
+
+ if (buf_size < 4 + avctx->width)
+ goto packet_small;
for (i = 0; i < 4; i++)
a->offset[i] = *bytestream++;
+ buf_size -= 4;
offset = a->offset[0] - a->delta[bytestream[2] & 0xF];
for (x = 0; x < avctx->width; x += 4) {
*cr++ = bytestream[1];
bytestream += 4;
+ buf_size -= 4;
}
} else {
+ if (buf_size < avctx->width / 2)
+ goto packet_small;
+
offset = a->offset[y & 3] - a->delta[bytestream[2] & 0xF];
for (x = 0; x < avctx->width; x += 8) {
luma[7] = offset += a->delta[bytestream[1] >> 4];
luma += 8;
bytestream += 4;
+ buf_size -= 4;
}
}
}
- *picture = a->picture;
*got_frame = 1;
return buf_size;
+packet_small:
+ av_log(avctx, AV_LOG_ERROR, "Input packet too small.\n");
+ return AVERROR_INVALIDDATA;
}
AVCodec ff_vcr1_decoder = {
.name = "vcr1",
+ .long_name = NULL_IF_CONFIG_SMALL("ATI VCR1"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_VCR1,
.priv_data_size = sizeof(VCR1Context),
.init = vcr1_decode_init,
- .close = vcr1_decode_end,
.decode = vcr1_decode_frame,
.capabilities = CODEC_CAP_DR1,
- .long_name = NULL_IF_CONFIG_SMALL("ATI VCR1"),
-};
-
-/* Disable the encoder. */
-#undef CONFIG_VCR1_ENCODER
-#define CONFIG_VCR1_ENCODER 0
-
-#if CONFIG_VCR1_ENCODER
-
-#include "put_bits.h"
-
-static int vcr1_encode_frame(AVCodecContext *avctx, unsigned char *buf,
- int buf_size, void *data)
-{
- VCR1Context *const a = avctx->priv_data;
- AVFrame *pict = data;
- AVFrame *const p = &a->picture;
- int size;
-
- *p = *pict;
- p->pict_type = AV_PICTURE_TYPE_I;
- p->key_frame = 1;
-
- avpriv_align_put_bits(&a->pb);
- flush_put_bits(&a->pb);
-
- size = put_bits_count(&a->pb) / 32;
-
- return size * 4;
-}
-
-AVCodec ff_vcr1_encoder = {
- .name = "vcr1",
- .type = AVMEDIA_TYPE_VIDEO,
- .id = AV_CODEC_ID_VCR1,
- .priv_data_size = sizeof(VCR1Context),
- .init = vcr1_common_init,
- .encode = vcr1_encode_frame,
- .long_name = NULL_IF_CONFIG_SMALL("ATI VCR1"),
};
-#endif /* CONFIG_VCR1_ENCODER */