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avcodec/proresdec : add 12b prores idct

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based on patch by Kieran Kunhya
This commit is contained in:
Martin Vignali 2018-11-17 23:37:50 +01:00
parent fddc92d454
commit 6a583261ea
3 changed files with 45 additions and 3 deletions
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31
libavcodec/proresdsp.c
View File

@ -29,36 +29,61 @@
#define CLIP_MIN (1 << 2) ///< minimum value for clipping resulting pixels
#define CLIP_MAX_10 (1 << 10) - CLIP_MIN - 1 ///< maximum value for clipping resulting pixels
#define CLIP_MAX_12 (1 << 12) - CLIP_MIN - 1 ///< maximum value for clipping resulting pixels
#define CLIP_10(x) (av_clip((x), CLIP_MIN, CLIP_MAX_10))
#define CLIP_12(x) (av_clip((x), CLIP_MIN, CLIP_MAX_12))
/**
* Add bias value, clamp and output pixels of a slice
*/
static void put_pixels_10(uint16_t *dst, ptrdiff_t linesize, const int16_t *in)
{
static inline void put_pixel(uint16_t *dst, ptrdiff_t linesize, const int16_t *in, int bits_per_raw_sample) {
int x, y, src_offset, dst_offset;
for (y = 0, dst_offset = 0; y < 8; y++, dst_offset += linesize) {
for (x = 0; x < 8; x++) {
src_offset = (y << 3) + x;
dst[dst_offset + x] = CLIP_10(in[src_offset]);
if (bits_per_raw_sample == 10) {
dst[dst_offset + x] = CLIP_10(in[src_offset]);
} else {//12b
dst[dst_offset + x] = CLIP_12(in[src_offset]);
}
}
}
}
static void put_pixels_10(uint16_t *dst, ptrdiff_t linesize, const int16_t *in)
{
put_pixel(dst, linesize, in, 10);
}
static void put_pixels_12(uint16_t *dst, ptrdiff_t linesize, const int16_t *in)
{
put_pixel(dst, linesize, in, 12);
}
static void prores_idct_put_10_c(uint16_t *out, ptrdiff_t linesize, int16_t *block, const int16_t *qmat)
{
ff_prores_idct_10(block, qmat);
put_pixels_10(out, linesize >> 1, block);
}
static void prores_idct_put_12_c(uint16_t *out, ptrdiff_t linesize, int16_t *block, const int16_t *qmat)
{
ff_prores_idct_12(block, qmat);
put_pixels_12(out, linesize >> 1, block);
}
av_cold int ff_proresdsp_init(ProresDSPContext *dsp, AVCodecContext *avctx)
{
if (avctx->bits_per_raw_sample == 10) {
dsp->idct_put = prores_idct_put_10_c;
dsp->idct_permutation_type = FF_IDCT_PERM_NONE;
} else if (avctx->bits_per_raw_sample == 12) {
dsp->idct_put = prores_idct_put_12_c;
dsp->idct_permutation_type = FF_IDCT_PERM_NONE;
} else {
return AVERROR_BUG;
}

16
libavcodec/simple_idct.c
View File

@ -251,3 +251,19 @@ void ff_prores_idct_10(int16_t *block, const int16_t *qmat)
idctSparseCol_extrashift_10(block + i);
}
}
void ff_prores_idct_12(int16_t *block, const int16_t *qmat)
{
int i;
for (i = 0; i < 64; i++)
block[i] *= qmat[i];
for (i = 0; i < 8; i++)
idctRowCondDC_int16_12bit(block + i*8, 0);
for (i = 0; i < 8; i++) {
block[i] += 8192;
idctSparseCol_int16_12bit(block + i);
}
}

1
libavcodec/simple_idct.h
View File

@ -53,6 +53,7 @@ void ff_simple_idct_int16_12bit(int16_t *block);
* for larger scale of input coefficients.
*/
void ff_prores_idct_10(int16_t *block, const int16_t *qmat);
void ff_prores_idct_12(int16_t *block, const int16_t *qmat);
void ff_simple_idct248_put(uint8_t *dest, ptrdiff_t line_size, int16_t *block);