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avcodec/dnxhddec: add support for very big resolutions

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Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2017-04-11 00:08:39 +02:00
parent 27ebdcf079
commit 25e491b6f9
2 changed files with 8 additions and 4 deletions
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2
libavcodec/dnxhd_parser.c
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@ -43,7 +43,7 @@ static int dnxhd_get_hr_frame_size(int cid, int w, int h)
if (i < 0)
return i;
result = ((h + 15) / 16) * ((w + 15) / 16) * ff_dnxhd_cid_table[i].packet_scale.num / ff_dnxhd_cid_table[i].packet_scale.den;
result = ((h + 15) / 16) * ((w + 15) / 16) * (int64_t)ff_dnxhd_cid_table[i].packet_scale.num / ff_dnxhd_cid_table[i].packet_scale.den;
result = (result + 2048) / 4096 * 4096;
return FFMAX(result, 8192);

10
libavcodec/dnxhddec.c
View File

@ -58,7 +58,7 @@ typedef struct DNXHDContext {
unsigned int width, height;
enum AVPixelFormat pix_fmt;
unsigned int mb_width, mb_height;
uint32_t mb_scan_index[256];
uint32_t mb_scan_index[512];
int data_offset; // End of mb_scan_index, where macroblocks start
int cur_field; ///< current interlaced field
VLC ac_vlc, dc_vlc, run_vlc;
@ -285,7 +285,7 @@ static int dnxhd_decode_header(DNXHDContext *ctx, AVFrame *frame,
}
ctx->mb_width = (ctx->width + 15)>> 4;
ctx->mb_height = buf[0x16d];
ctx->mb_height = AV_RB16(buf + 0x16c);
if ((ctx->height + 15) >> 4 == ctx->mb_height && frame->interlaced_frame)
ctx->height <<= 1;
@ -313,7 +313,11 @@ static int dnxhd_decode_header(DNXHDContext *ctx, AVFrame *frame,
return AVERROR_INVALIDDATA;
}
av_assert0((unsigned)ctx->mb_height <= FF_ARRAY_ELEMS(ctx->mb_scan_index));
if (ctx->mb_height > FF_ARRAY_ELEMS(ctx->mb_scan_index)) {
av_log(ctx->avctx, AV_LOG_ERROR,
"mb_height too big (%d > %"PRIu64").\n", ctx->mb_height, FF_ARRAY_ELEMS(ctx->mb_scan_index));
return AVERROR_INVALIDDATA;
}
for (i = 0; i < ctx->mb_height; i++) {
ctx->mb_scan_index[i] = AV_RB32(buf + 0x170 + (i << 2));