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// SPDX-License-Identifier: LGPL-2.1
/*
* A V4L2 frontend for the FWHT codec
*
* Copyright 2018 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
*/
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/videodev2.h>
#include "codec-v4l2-fwht.h"
static const struct v4l2_fwht_pixfmt_info v4l2_fwht_pixfmts[] = {
{ V4L2_PIX_FMT_YUV420, 1, 3, 2, 1, 1, 2, 2 },
{ V4L2_PIX_FMT_YVU420, 1, 3, 2, 1, 1, 2, 2 },
{ V4L2_PIX_FMT_YUV422P, 1, 2, 1, 1, 1, 2, 1 },
{ V4L2_PIX_FMT_NV12, 1, 3, 2, 1, 2, 2, 2 },
{ V4L2_PIX_FMT_NV21, 1, 3, 2, 1, 2, 2, 2 },
{ V4L2_PIX_FMT_NV16, 1, 2, 1, 1, 2, 2, 1 },
{ V4L2_PIX_FMT_NV61, 1, 2, 1, 1, 2, 2, 1 },
{ V4L2_PIX_FMT_NV24, 1, 3, 1, 1, 2, 1, 1 },
{ V4L2_PIX_FMT_NV42, 1, 3, 1, 1, 2, 1, 1 },
{ V4L2_PIX_FMT_YUYV, 2, 2, 1, 2, 4, 2, 1 },
{ V4L2_PIX_FMT_YVYU, 2, 2, 1, 2, 4, 2, 1 },
{ V4L2_PIX_FMT_UYVY, 2, 2, 1, 2, 4, 2, 1 },
{ V4L2_PIX_FMT_VYUY, 2, 2, 1, 2, 4, 2, 1 },
{ V4L2_PIX_FMT_BGR24, 3, 3, 1, 3, 3, 1, 1 },
{ V4L2_PIX_FMT_RGB24, 3, 3, 1, 3, 3, 1, 1 },
{ V4L2_PIX_FMT_HSV24, 3, 3, 1, 3, 3, 1, 1 },
{ V4L2_PIX_FMT_BGR32, 4, 4, 1, 4, 4, 1, 1 },
{ V4L2_PIX_FMT_XBGR32, 4, 4, 1, 4, 4, 1, 1 },
{ V4L2_PIX_FMT_RGB32, 4, 4, 1, 4, 4, 1, 1 },
{ V4L2_PIX_FMT_XRGB32, 4, 4, 1, 4, 4, 1, 1 },
{ V4L2_PIX_FMT_HSV32, 4, 4, 1, 4, 4, 1, 1 },
};
const struct v4l2_fwht_pixfmt_info *v4l2_fwht_find_pixfmt(u32 pixelformat)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE(v4l2_fwht_pixfmts); i++)
if (v4l2_fwht_pixfmts[i].id == pixelformat)
return v4l2_fwht_pixfmts + i;
return NULL;
}
const struct v4l2_fwht_pixfmt_info *v4l2_fwht_get_pixfmt(u32 idx)
{
if (idx >= ARRAY_SIZE(v4l2_fwht_pixfmts))
return NULL;
return v4l2_fwht_pixfmts + idx;
}
int v4l2_fwht_encode(struct v4l2_fwht_state *state, u8 *p_in, u8 *p_out)
{
unsigned int size = state->width * state->height;
const struct v4l2_fwht_pixfmt_info *info = state->info;
struct fwht_cframe_hdr *p_hdr;
struct fwht_cframe cf;
struct fwht_raw_frame rf;
u32 encoding;
u32 flags = 0;
if (!info)
return -EINVAL;
rf.width = state->width;
rf.height = state->height;
rf.luma = p_in;
rf.width_div = info->width_div;
rf.height_div = info->height_div;
rf.luma_step = info->luma_step;
rf.chroma_step = info->chroma_step;
switch (info->id) {
case V4L2_PIX_FMT_YUV420:
rf.cb = rf.luma + size;
rf.cr = rf.cb + size / 4;
break;
case V4L2_PIX_FMT_YVU420:
rf.cr = rf.luma + size;
rf.cb = rf.cr + size / 4;
break;
case V4L2_PIX_FMT_YUV422P:
rf.cb = rf.luma + size;
rf.cr = rf.cb + size / 2;
break;
case V4L2_PIX_FMT_NV12:
case V4L2_PIX_FMT_NV16:
case V4L2_PIX_FMT_NV24:
rf.cb = rf.luma + size;
rf.cr = rf.cb + 1;
break;
case V4L2_PIX_FMT_NV21:
case V4L2_PIX_FMT_NV61:
case V4L2_PIX_FMT_NV42:
rf.cr = rf.luma + size;
rf.cb = rf.cr + 1;
break;
case V4L2_PIX_FMT_YUYV:
rf.cb = rf.luma + 1;
rf.cr = rf.cb + 2;
break;
case V4L2_PIX_FMT_YVYU:
rf.cr = rf.luma + 1;
rf.cb = rf.cr + 2;
break;
case V4L2_PIX_FMT_UYVY:
rf.cb = rf.luma;
rf.cr = rf.cb + 2;
rf.luma++;
break;
case V4L2_PIX_FMT_VYUY:
rf.cr = rf.luma;
rf.cb = rf.cr + 2;
rf.luma++;
break;
case V4L2_PIX_FMT_RGB24:
case V4L2_PIX_FMT_HSV24:
rf.cr = rf.luma;
rf.cb = rf.cr + 2;
rf.luma++;
break;
case V4L2_PIX_FMT_BGR24:
rf.cb = rf.luma;
rf.cr = rf.cb + 2;
rf.luma++;
break;
case V4L2_PIX_FMT_RGB32:
case V4L2_PIX_FMT_XRGB32:
case V4L2_PIX_FMT_HSV32:
rf.cr = rf.luma + 1;
rf.cb = rf.cr + 2;
rf.luma += 2;
break;
case V4L2_PIX_FMT_BGR32:
case V4L2_PIX_FMT_XBGR32:
rf.cb = rf.luma;
rf.cr = rf.cb + 2;
rf.luma++;
break;
default:
return -EINVAL;
}
cf.width = state->width;
cf.height = state->height;
cf.i_frame_qp = state->i_frame_qp;
cf.p_frame_qp = state->p_frame_qp;
cf.rlc_data = (__be16 *)(p_out + sizeof(*p_hdr));
encoding = fwht_encode_frame(&rf, &state->ref_frame, &cf,
!state->gop_cnt,
state->gop_cnt == state->gop_size - 1);
if (!(encoding & FWHT_FRAME_PCODED))
state->gop_cnt = 0;
if (++state->gop_cnt >= state->gop_size)
state->gop_cnt = 0;
p_hdr = (struct fwht_cframe_hdr *)p_out;
p_hdr->magic1 = FWHT_MAGIC1;
p_hdr->magic2 = FWHT_MAGIC2;
p_hdr->version = htonl(FWHT_VERSION);
p_hdr->width = htonl(cf.width);
p_hdr->height = htonl(cf.height);
if (encoding & FWHT_LUMA_UNENCODED)
flags |= FWHT_FL_LUMA_IS_UNCOMPRESSED;
if (encoding & FWHT_CB_UNENCODED)
flags |= FWHT_FL_CB_IS_UNCOMPRESSED;
if (encoding & FWHT_CR_UNENCODED)
flags |= FWHT_FL_CR_IS_UNCOMPRESSED;
if (rf.height_div == 1)
flags |= FWHT_FL_CHROMA_FULL_HEIGHT;
if (rf.width_div == 1)
flags |= FWHT_FL_CHROMA_FULL_WIDTH;
p_hdr->flags = htonl(flags);
p_hdr->colorspace = htonl(state->colorspace);
p_hdr->xfer_func = htonl(state->xfer_func);
p_hdr->ycbcr_enc = htonl(state->ycbcr_enc);
p_hdr->quantization = htonl(state->quantization);
p_hdr->size = htonl(cf.size);
state->ref_frame.width = cf.width;
state->ref_frame.height = cf.height;
return cf.size + sizeof(*p_hdr);
}
int v4l2_fwht_decode(struct v4l2_fwht_state *state, u8 *p_in, u8 *p_out)
{
unsigned int size = state->width * state->height;
unsigned int chroma_size = size;
unsigned int i;
u32 flags;
struct fwht_cframe_hdr *p_hdr;
struct fwht_cframe cf;
u8 *p;
if (!state->info)
return -EINVAL;
p_hdr = (struct fwht_cframe_hdr *)p_in;
cf.width = ntohl(p_hdr->width);
cf.height = ntohl(p_hdr->height);
flags = ntohl(p_hdr->flags);
state->colorspace = ntohl(p_hdr->colorspace);
state->xfer_func = ntohl(p_hdr->xfer_func);
state->ycbcr_enc = ntohl(p_hdr->ycbcr_enc);
state->quantization = ntohl(p_hdr->quantization);
cf.rlc_data = (__be16 *)(p_in + sizeof(*p_hdr));
if (p_hdr->magic1 != FWHT_MAGIC1 ||
p_hdr->magic2 != FWHT_MAGIC2 ||
ntohl(p_hdr->version) != FWHT_VERSION ||
(cf.width & 7) || (cf.height & 7))
return -EINVAL;
/* TODO: support resolution changes */
if (cf.width != state->width || cf.height != state->height)
return -EINVAL;
if (!(flags & FWHT_FL_CHROMA_FULL_WIDTH))
chroma_size /= 2;
if (!(flags & FWHT_FL_CHROMA_FULL_HEIGHT))
chroma_size /= 2;
fwht_decode_frame(&cf, &state->ref_frame, flags);
switch (state->info->id) {
case V4L2_PIX_FMT_YUV420:
case V4L2_PIX_FMT_YUV422P:
memcpy(p_out, state->ref_frame.luma, size);
p_out += size;
memcpy(p_out, state->ref_frame.cb, chroma_size);
p_out += chroma_size;
memcpy(p_out, state->ref_frame.cr, chroma_size);
break;
case V4L2_PIX_FMT_YVU420:
memcpy(p_out, state->ref_frame.luma, size);
p_out += size;
memcpy(p_out, state->ref_frame.cr, chroma_size);
p_out += chroma_size;
memcpy(p_out, state->ref_frame.cb, chroma_size);
break;
case V4L2_PIX_FMT_NV12:
case V4L2_PIX_FMT_NV16:
case V4L2_PIX_FMT_NV24:
memcpy(p_out, state->ref_frame.luma, size);
p_out += size;
for (i = 0, p = p_out; i < chroma_size; i++) {
*p++ = state->ref_frame.cb[i];
*p++ = state->ref_frame.cr[i];
}
break;
case V4L2_PIX_FMT_NV21:
case V4L2_PIX_FMT_NV61:
case V4L2_PIX_FMT_NV42:
memcpy(p_out, state->ref_frame.luma, size);
p_out += size;
for (i = 0, p = p_out; i < chroma_size; i++) {
*p++ = state->ref_frame.cr[i];
*p++ = state->ref_frame.cb[i];
}
break;
case V4L2_PIX_FMT_YUYV:
for (i = 0, p = p_out; i < size; i += 2) {
*p++ = state->ref_frame.luma[i];
*p++ = state->ref_frame.cb[i / 2];
*p++ = state->ref_frame.luma[i + 1];
*p++ = state->ref_frame.cr[i / 2];
}
break;
case V4L2_PIX_FMT_YVYU:
for (i = 0, p = p_out; i < size; i += 2) {
*p++ = state->ref_frame.luma[i];
*p++ = state->ref_frame.cr[i / 2];
*p++ = state->ref_frame.luma[i + 1];
*p++ = state->ref_frame.cb[i / 2];
}
break;
case V4L2_PIX_FMT_UYVY:
for (i = 0, p = p_out; i < size; i += 2) {
*p++ = state->ref_frame.cb[i / 2];
*p++ = state->ref_frame.luma[i];
*p++ = state->ref_frame.cr[i / 2];
*p++ = state->ref_frame.luma[i + 1];
}
break;
case V4L2_PIX_FMT_VYUY:
for (i = 0, p = p_out; i < size; i += 2) {
*p++ = state->ref_frame.cr[i / 2];
*p++ = state->ref_frame.luma[i];
*p++ = state->ref_frame.cb[i / 2];
*p++ = state->ref_frame.luma[i + 1];
}
break;
case V4L2_PIX_FMT_RGB24:
case V4L2_PIX_FMT_HSV24:
for (i = 0, p = p_out; i < size; i++) {
*p++ = state->ref_frame.cr[i];
*p++ = state->ref_frame.luma[i];
*p++ = state->ref_frame.cb[i];
}
break;
case V4L2_PIX_FMT_BGR24:
for (i = 0, p = p_out; i < size; i++) {
*p++ = state->ref_frame.cb[i];
*p++ = state->ref_frame.luma[i];
*p++ = state->ref_frame.cr[i];
}
break;
case V4L2_PIX_FMT_RGB32:
case V4L2_PIX_FMT_XRGB32:
case V4L2_PIX_FMT_HSV32:
for (i = 0, p = p_out; i < size; i++) {
*p++ = 0;
*p++ = state->ref_frame.cr[i];
*p++ = state->ref_frame.luma[i];
*p++ = state->ref_frame.cb[i];
}
break;
case V4L2_PIX_FMT_BGR32:
case V4L2_PIX_FMT_XBGR32:
for (i = 0, p = p_out; i < size; i++) {
*p++ = state->ref_frame.cb[i];
*p++ = state->ref_frame.luma[i];
*p++ = state->ref_frame.cr[i];
*p++ = 0;
}
break;
default:
return -EINVAL;
}
return 0;
}
|
