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avcodec/v210dec: add support for strideless v210 as in BOXX files 

Fixes ticket #1838.

Signed-off-by: Marton Balint <cus@passwd.hu>
This commit is contained in:
Marton Balint 2022-06-12 03:38:56 +02:00
parent a10132b967
commit 96f2fc3841
1 changed files with 27 additions and 7 deletions
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34
libavcodec/v210dec.c
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@ -26,6 +26,7 @@
#include "v210dec.h"
#include "v210dec_init.h"
#include "libavutil/bswap.h"
#include "libavutil/imgutils.h"
#include "libavutil/internal.h"
#include "libavutil/intreadwrite.h"
#include "thread.h"
@ -140,7 +141,7 @@ static int decode_frame(AVCodecContext *avctx, AVFrame *pic,
const uint8_t *psrc = avpkt->data;
if (s->custom_stride )
stride = s->custom_stride;
stride = s->custom_stride > 0 ? s->custom_stride : 0;
else {
stride = v210_stride(avctx->width, 48);
if (avpkt->size < stride * avctx->height) {
@ -155,14 +156,21 @@ static int decode_frame(AVCodecContext *avctx, AVFrame *pic,
break;
}
}
if (align < 6 && avctx->codec_tag == MKTAG('b', 'x', 'y', '2'))
stride = 0;
}
}
if (avpkt->size < (int64_t)stride * avctx->height) {
if (stride == 0 && ((avctx->width & 1) || (int64_t)avctx->width * avctx->height > INT_MAX / 6)) {
av_log(avctx, AV_LOG_ERROR, "Strideless v210 is not supported for size %dx%d\n", avctx->width, avctx->height);
return AVERROR_INVALIDDATA;
}
if (stride > 0 && avpkt->size < (int64_t)stride * avctx->height ||
stride == 0 && avpkt->size < v210_stride(avctx->width * avctx->height, 6)) {
av_log(avctx, AV_LOG_ERROR, "packet too small\n");
return AVERROR_INVALIDDATA;
}
td.stride = stride;
if ( avctx->codec_tag == MKTAG('C', '2', '1', '0')
&& avpkt->size > 64
&& AV_RN32(psrc) == AV_RN32("INFO")
@ -181,9 +189,21 @@ static int decode_frame(AVCodecContext *avctx, AVFrame *pic,
pic->pict_type = AV_PICTURE_TYPE_I;
pic->key_frame = 1;
td.buf = (uint8_t*)psrc;
td.frame = pic;
avctx->execute2(avctx, v210_decode_slice, &td, NULL, s->thread_count);
if (stride) {
td.stride = stride;
td.buf = (uint8_t*)psrc;
td.frame = pic;
avctx->execute2(avctx, v210_decode_slice, &td, NULL, s->thread_count);
} else {
uint8_t *pointers[4];
int linesizes[4];
int ret = av_image_alloc(pointers, linesizes, avctx->width, avctx->height, avctx->pix_fmt, 1);
if (ret < 0)
return ret;
decode_row((const uint32_t *)psrc, (uint16_t *)pointers[0], (uint16_t *)pointers[1], (uint16_t *)pointers[2], avctx->width * avctx->height, s->unpack_frame);
av_image_copy(pic->data, pic->linesize, (const uint8_t **)pointers, linesizes, avctx->pix_fmt, avctx->width, avctx->height);
av_freep(&pointers[0]);
}
if (avctx->field_order > AV_FIELD_PROGRESSIVE) {
/* we have interlaced material flagged in container */
@ -200,7 +220,7 @@ static int decode_frame(AVCodecContext *avctx, AVFrame *pic,
#define V210DEC_FLAGS AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
static const AVOption v210dec_options[] = {
{"custom_stride", "Custom V210 stride", offsetof(V210DecContext, custom_stride), AV_OPT_TYPE_INT,
{.i64 = 0}, 0, INT_MAX, V210DEC_FLAGS},
{.i64 = 0}, -1, INT_MAX, V210DEC_FLAGS},
{NULL}
};