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avcodec/msrleenc: Constify pointers for frame->data

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Encoders (usually) have no business modifying frame->data
(which need not be writable), so they should use the appropriate
pointers.

Reviewed-by: Tomas Härdin <git@haerdin.se>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt 2023-07-16 16:53:52 +02:00
parent 3cb0bd06a8
commit 9c471c76cb
1 changed files with 6 additions and 4 deletions
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10
libavcodec/msrleenc.c
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@ -64,7 +64,8 @@ static void write_run(AVCodecContext *avctx, uint8_t **data, int len, int value)
}
}
static void write_absolute(AVCodecContext *avctx, uint8_t **data, uint8_t *line, int len)
static void write_absolute(AVCodecContext *avctx, uint8_t **data,
const uint8_t *line, int len)
{
// writing 255 would be wasteful here due to the padding requirement
while (len >= 254) {
@ -136,7 +137,8 @@ static void write_yskip(AVCodecContext *avctx, uint8_t **data, int yskip)
}
// used both to encode lines in keyframes and to encode lines between deltas
static void encode_line(AVCodecContext *avctx, uint8_t **data, uint8_t *line, int length)
static void encode_line(AVCodecContext *avctx, uint8_t **data,
const uint8_t *line, int length)
{
int run = 0, last = -1, absstart = 0;
if (length == 0)
@ -192,8 +194,8 @@ static int encode(AVCodecContext *avctx, AVPacket *pkt,
// compare to previous frame
int yskip = 0; // we can encode large skips using deltas
for (int y = avctx->height-1; y >= 0; y--) {
uint8_t *line = &pict->data[0][y*pict->linesize[0]];
uint8_t *prev = &s->last_frame->data[0][y*s->last_frame->linesize[0]];
const uint8_t *line = &pict->data[0][y*pict->linesize[0]];
const uint8_t *prev = &s->last_frame->data[0][y*s->last_frame->linesize[0]];
// we need at least 5 pixels in a row for a delta to be worthwhile
int delta = 0, linestart = 0, encoded = 0;
for (int x = 0; x < avctx->width; x++) {