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screenpresso: Drop parameter change check

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Size can never change, allowing us to use ff_reget_buffer, and to
simplify the code a little.
This commit is contained in:
Vittorio Giovara 2015-10-19 14:34:09 +02:00
parent 447b5b278c
commit 3c5cf2a31b
1 changed files with 12 additions and 17 deletions
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29
libavcodec/screenpresso.c
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@ -80,6 +80,12 @@ static av_cold int screenpresso_init(AVCodecContext *avctx)
avctx->pix_fmt = AV_PIX_FMT_BGR24;
/* Allocate maximum size possible, a full frame */
ctx->inflated_size = avctx->width * avctx->height * 3;
ctx->inflated_buf = av_malloc(ctx->inflated_size);
if (!ctx->inflated_buf)
return AVERROR(ENOMEM);
return 0;
}
@ -100,6 +106,7 @@ static int screenpresso_decode_frame(AVCodecContext *avctx, void *data,
{
ScreenpressoContext *ctx = avctx->priv_data;
AVFrame *frame = data;
uLongf length = ctx->inflated_size;
int keyframe;
int ret;
@ -117,30 +124,18 @@ static int screenpresso_decode_frame(AVCodecContext *avctx, void *data,
}
keyframe = (avpkt->data[0] == 0x73);
/* Resize deflate buffer and frame on resolution change */
if (ctx->inflated_size != avctx->width * avctx->height * 3) {
av_frame_unref(ctx->current);
ret = ff_get_buffer(avctx, ctx->current, AV_GET_BUFFER_FLAG_REF);
if (ret < 0)
return ret;
/* If malloc fails, reset len to avoid preserving an invalid value */
ctx->inflated_size = avctx->width * avctx->height * 3;
ret = av_reallocp(&ctx->inflated_buf, ctx->inflated_size);
if (ret < 0) {
ctx->inflated_size = 0;
return ret;
}
}
/* Inflate the frame after the 2 byte header */
ret = uncompress(ctx->inflated_buf, &ctx->inflated_size,
ret = uncompress(ctx->inflated_buf, &length,
avpkt->data + 2, avpkt->size - 2);
if (ret) {
av_log(avctx, AV_LOG_ERROR, "Deflate error %d.\n", ret);
return AVERROR_UNKNOWN;
}
ret = ff_reget_buffer(avctx, ctx->current);
if (ret < 0)
return ret;
/* When a keyframe is found, copy it (flipped) */
if (keyframe)
av_image_copy_plane(ctx->current->data[0] +