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avcodec/prosumer: Rename do_shift() to vertical_predict() 

It seems what this function does is a vertical prediction filter, thus
the new name should improve understanding.

rename the related table_b too

Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2018-09-22 18:14:04 +02:00
parent 0cd22fd752
commit 093607f0cd
1 changed files with 8 additions and 8 deletions
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16
libavcodec/prosumer.c
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@ -39,7 +39,7 @@ typedef struct ProSumerContext {
unsigned stride;
unsigned size;
uint32_t lut[0x10000];
uint8_t *table_b;
uint8_t *initial_line;
uint8_t *decbuffer;
} ProSumerContext;
@ -132,7 +132,7 @@ static int decompress(GetByteContext *gb, int size, PutByteContext *pb, const ui
return 0;
}
static void do_shift(uint32_t *dst, int offset, const uint32_t *src, int stride, int height)
static void vertical_predict(uint32_t *dst, int offset, const uint32_t *src, int stride, int height)
{
uint32_t x = (0x7F7F7F7F >> 1) & 0x7F7F7F7F;
@ -163,8 +163,8 @@ static int decode_frame(AVCodecContext *avctx, void *data,
bytestream2_init_writer(&s->pb, s->decbuffer, s->size);
decompress(&s->gb, AV_RL32(avpkt->data + 28) >> 1, &s->pb, s->lut);
do_shift((uint32_t *)s->decbuffer, 0, (uint32_t *)s->table_b, s->stride, 1);
do_shift((uint32_t *)s->decbuffer, s->stride, (uint32_t *)s->decbuffer, s->stride, avctx->height - 1);
vertical_predict((uint32_t *)s->decbuffer, 0, (uint32_t *)s->initial_line, s->stride, 1);
vertical_predict((uint32_t *)s->decbuffer, s->stride, (uint32_t *)s->decbuffer, s->stride, avctx->height - 1);
ret = ff_get_buffer(avctx, frame, 0);
if (ret < 0)
@ -344,11 +344,11 @@ static av_cold int decode_init(AVCodecContext *avctx)
avctx->pix_fmt = AV_PIX_FMT_YUV411P;
s->table_b = av_malloc(s->stride);
s->initial_line = av_malloc(s->stride);
s->decbuffer = av_malloc(s->size);
if (!s->table_b || !s->decbuffer)
if (!s->initial_line || !s->decbuffer)
return AVERROR(ENOMEM);
memset(s->table_b, 0x80u, s->stride);
memset(s->initial_line, 0x80u, s->stride);
fill_lut(s->lut);
@ -359,7 +359,7 @@ static av_cold int decode_close(AVCodecContext *avctx)
{
ProSumerContext *s = avctx->priv_data;
av_freep(&s->table_b);
av_freep(&s->initial_line);
av_freep(&s->decbuffer);
return 0;