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avcodec/arbc: Try to correct keyframe/frame type

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Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2019-04-14 11:11:42 +02:00
parent 8b10f09fd5
commit 7c2ee8d43d
1 changed files with 19 additions and 12 deletions
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31
libavcodec/arbc.c
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@ -38,15 +38,16 @@ typedef struct ARBCContext {
AVFrame *prev_frame;
} ARBCContext;
static void fill_tile4(AVCodecContext *avctx, int color, AVFrame *frame)
static int fill_tile4(AVCodecContext *avctx, int color, AVFrame *frame)
{
ARBCContext *s = avctx->priv_data;
GetByteContext *gb = &s->gb;
int nb_tiles = bytestream2_get_le16(gb);
int h = avctx->height - 1;
int pixels_overwritten = 0;
if ((avctx->width / 4 + 1) * (avctx->height / 4 + 1) < nb_tiles)
return;
return 0;
for (int i = 0; i < nb_tiles; i++) {
int y = bytestream2_get_byte(gb);
@ -63,14 +64,16 @@ static void fill_tile4(AVCodecContext *avctx, int color, AVFrame *frame)
continue;
}
AV_WB24(&frame->data[0][frame->linesize[0] * (h - j) + 3 * k], color);
pixels_overwritten ++;
}
mask = mask << 1;
}
}
}
return pixels_overwritten;
}
static void fill_tileX(AVCodecContext *avctx, int tile_width, int tile_height,
static int fill_tileX(AVCodecContext *avctx, int tile_width, int tile_height,
int color, AVFrame *frame)
{
ARBCContext *s = avctx->priv_data;
@ -79,9 +82,10 @@ static void fill_tileX(AVCodecContext *avctx, int tile_width, int tile_height,
const int step_w = tile_width / 4;
int nb_tiles = bytestream2_get_le16(gb);
int h = avctx->height - 1;
int pixels_overwritten = 0;
if ((avctx->width / tile_width + 1) * (avctx->height / tile_height + 1) < nb_tiles)
return;
return 0;
for (int i = 0; i < nb_tiles; i++) {
int y = bytestream2_get_byte(gb);
@ -100,11 +104,13 @@ static void fill_tileX(AVCodecContext *avctx, int tile_width, int tile_height,
AV_WB24(&frame->data[0][frame->linesize[0] * (h - (j + m)) + 3 * (k + n)], color);
}
}
pixels_overwritten += FFMIN(step_h, avctx->height - j) * FFMIN(step_w, avctx->width - k);
}
mask = mask << 1;
}
}
}
return pixels_overwritten;
}
static int decode_frame(AVCodecContext *avctx, void *data,
@ -112,7 +118,8 @@ static int decode_frame(AVCodecContext *avctx, void *data,
{
ARBCContext *s = avctx->priv_data;
AVFrame *frame = data;
int ret, nb_segments, keyframe = 1;
int ret, nb_segments;
int prev_pixels = avctx->width * avctx->height;
if (avpkt->size < 10)
return AVERROR_INVALIDDATA;
@ -151,23 +158,23 @@ static int decode_frame(AVCodecContext *avctx, void *data,
resolution_flag = bytestream2_get_byte(&s->gb);
if (resolution_flag & 0x10)
fill_tileX(avctx, 1024, 1024, fill, frame);
prev_pixels -= fill_tileX(avctx, 1024, 1024, fill, frame);
if (resolution_flag & 0x08)
fill_tileX(avctx, 256, 256, fill, frame);
prev_pixels -= fill_tileX(avctx, 256, 256, fill, frame);
if (resolution_flag & 0x04)
fill_tileX(avctx, 64, 64, fill, frame);
prev_pixels -= fill_tileX(avctx, 64, 64, fill, frame);
if (resolution_flag & 0x02)
fill_tileX(avctx, 16, 16, fill, frame);
prev_pixels -= fill_tileX(avctx, 16, 16, fill, frame);
if (resolution_flag & 0x01)
fill_tile4(avctx, fill, frame);
prev_pixels -= fill_tile4(avctx, fill, frame);
}
av_frame_unref(s->prev_frame);
if ((ret = av_frame_ref(s->prev_frame, frame)) < 0)
return ret;
frame->pict_type = keyframe ? AV_PICTURE_TYPE_I : AV_PICTURE_TYPE_P;
frame->key_frame = keyframe;
frame->pict_type = prev_pixels <= 0 ? AV_PICTURE_TYPE_I : AV_PICTURE_TYPE_P;
frame->key_frame = prev_pixels <= 0;
*got_frame = 1;
return avpkt->size;