}
mb_num = get_bits(&s->gb, mb_num_bits);
- if (mb_num >= s->mb_num) {
+ if (mb_num >= s->mb_num || !mb_num) {
av_log(s->avctx, AV_LOG_ERROR,
"illegal mb_num in video packet (%d %d) \n", mb_num, s->mb_num);
return -1;
*/
static int mpeg4_decode_partitioned_mb(MpegEncContext *s, int16_t block[6][64])
{
- Mpeg4DecContext *ctx = (Mpeg4DecContext *)s;
+ Mpeg4DecContext *ctx = s->avctx->priv_data;
int cbp, mb_type;
const int xy = s->mb_x + s->mb_y * s->mb_stride;
+ av_assert2(s == (void*)ctx);
+
mb_type = s->current_picture.mb_type[xy];
cbp = s->cbp_table[xy];
static int mpeg4_decode_mb(MpegEncContext *s, int16_t block[6][64])
{
- Mpeg4DecContext *ctx = (Mpeg4DecContext *)s;
+ Mpeg4DecContext *ctx = s->avctx->priv_data;
int cbpc, cbpy, i, cbp, pred_x, pred_y, mx, my, dquant;
int16_t *mot_val;
static const int8_t quant_tab[4] = { -1, -2, 1, 2 };
const int xy = s->mb_x + s->mb_y * s->mb_stride;
+ av_assert2(s == (void*)ctx);
av_assert2(s->h263_pred);
if (s->pict_type == AV_PICTURE_TYPE_P ||
return 0;
}
+static int mpeg4_decode_visual_object(MpegEncContext *s, GetBitContext *gb)
+{
+ int visual_object_type;
+ int is_visual_object_identifier = get_bits1(gb);
+
+ if (is_visual_object_identifier) {
+ skip_bits(gb, 4+3);
+ }
+ visual_object_type = get_bits(gb, 4);
+
+ if (visual_object_type == VOT_VIDEO_ID ||
+ visual_object_type == VOT_STILL_TEXTURE_ID) {
+ int video_signal_type = get_bits1(gb);
+ if (video_signal_type) {
+ int video_range, color_description;
+ skip_bits(gb, 3); // video_format
+ video_range = get_bits1(gb);
+ color_description = get_bits1(gb);
+
+ s->avctx->color_range = video_range ? AVCOL_RANGE_JPEG : AVCOL_RANGE_MPEG;
+
+ if (color_description) {
+ s->avctx->color_primaries = get_bits(gb, 8);
+ s->avctx->color_trc = get_bits(gb, 8);
+ s->avctx->colorspace = get_bits(gb, 8);
+ }
+ }
+ }
+
+ return 0;
+}
+
static int decode_vol_header(Mpeg4DecContext *ctx, GetBitContext *gb)
{
MpegEncContext *s = &ctx->m;
if (startcode >= 0x120 && startcode <= 0x12F) {
if (vol) {
- av_log(s->avctx, AV_LOG_ERROR, "Multiple VOL headers");
- return AVERROR_INVALIDDATA;
+ av_log(s->avctx, AV_LOG_WARNING, "Ignoring multiple VOL headers\n");
+ continue;
}
vol++;
if ((ret = decode_vol_header(ctx, gb)) < 0)
mpeg4_decode_gop_header(s, gb);
} else if (startcode == VOS_STARTCODE) {
mpeg4_decode_profile_level(s, gb);
+ } else if (startcode == VISUAL_OBJ_STARTCODE) {
+ mpeg4_decode_visual_object(s, gb);
} else if (startcode == VOP_STARTCODE) {
break;
}