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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, 3, 3, FWHT_FL_PIXENC_YUV},
{ V4L2_PIX_FMT_YVU420, 1, 3, 2, 1, 1, 2, 2, 3, 3, FWHT_FL_PIXENC_YUV},
{ V4L2_PIX_FMT_YUV422P, 1, 2, 1, 1, 1, 2, 1, 3, 3, FWHT_FL_PIXENC_YUV},
{ V4L2_PIX_FMT_NV12, 1, 3, 2, 1, 2, 2, 2, 3, 2, FWHT_FL_PIXENC_YUV},
{ V4L2_PIX_FMT_NV21, 1, 3, 2, 1, 2, 2, 2, 3, 2, FWHT_FL_PIXENC_YUV},
{ V4L2_PIX_FMT_NV16, 1, 2, 1, 1, 2, 2, 1, 3, 2, FWHT_FL_PIXENC_YUV},
{ V4L2_PIX_FMT_NV61, 1, 2, 1, 1, 2, 2, 1, 3, 2, FWHT_FL_PIXENC_YUV},
{ V4L2_PIX_FMT_NV24, 1, 3, 1, 1, 2, 1, 1, 3, 2, FWHT_FL_PIXENC_YUV},
{ V4L2_PIX_FMT_NV42, 1, 3, 1, 1, 2, 1, 1, 3, 2, FWHT_FL_PIXENC_YUV},
{ V4L2_PIX_FMT_YUYV, 2, 2, 1, 2, 4, 2, 1, 3, 1, FWHT_FL_PIXENC_YUV},
{ V4L2_PIX_FMT_YVYU, 2, 2, 1, 2, 4, 2, 1, 3, 1, FWHT_FL_PIXENC_YUV},
{ V4L2_PIX_FMT_UYVY, 2, 2, 1, 2, 4, 2, 1, 3, 1, FWHT_FL_PIXENC_YUV},
{ V4L2_PIX_FMT_VYUY, 2, 2, 1, 2, 4, 2, 1, 3, 1, FWHT_FL_PIXENC_YUV},
{ V4L2_PIX_FMT_BGR24, 3, 3, 1, 3, 3, 1, 1, 3, 1, FWHT_FL_PIXENC_RGB},
{ V4L2_PIX_FMT_RGB24, 3, 3, 1, 3, 3, 1, 1, 3, 1, FWHT_FL_PIXENC_RGB},
{ V4L2_PIX_FMT_HSV24, 3, 3, 1, 3, 3, 1, 1, 3, 1, FWHT_FL_PIXENC_HSV},
{ V4L2_PIX_FMT_BGR32, 4, 4, 1, 4, 4, 1, 1, 4, 1, FWHT_FL_PIXENC_RGB},
{ V4L2_PIX_FMT_XBGR32, 4, 4, 1, 4, 4, 1, 1, 4, 1, FWHT_FL_PIXENC_RGB},
{ V4L2_PIX_FMT_ABGR32, 4, 4, 1, 4, 4, 1, 1, 4, 1, FWHT_FL_PIXENC_RGB},
{ V4L2_PIX_FMT_RGB32, 4, 4, 1, 4, 4, 1, 1, 4, 1, FWHT_FL_PIXENC_RGB},
{ V4L2_PIX_FMT_XRGB32, 4, 4, 1, 4, 4, 1, 1, 4, 1, FWHT_FL_PIXENC_RGB},
{ V4L2_PIX_FMT_ARGB32, 4, 4, 1, 4, 4, 1, 1, 4, 1, FWHT_FL_PIXENC_RGB},
{ V4L2_PIX_FMT_BGRX32, 4, 4, 1, 4, 4, 1, 1, 4, 1, FWHT_FL_PIXENC_RGB},
{ V4L2_PIX_FMT_BGRA32, 4, 4, 1, 4, 4, 1, 1, 4, 1, FWHT_FL_PIXENC_RGB},
{ V4L2_PIX_FMT_RGBX32, 4, 4, 1, 4, 4, 1, 1, 4, 1, FWHT_FL_PIXENC_RGB},
{ V4L2_PIX_FMT_RGBA32, 4, 4, 1, 4, 4, 1, 1, 4, 1, FWHT_FL_PIXENC_RGB},
{ V4L2_PIX_FMT_HSV32, 4, 4, 1, 4, 4, 1, 1, 4, 1, FWHT_FL_PIXENC_HSV},
{ V4L2_PIX_FMT_GREY, 1, 1, 1, 1, 0, 1, 1, 1, 1, FWHT_FL_PIXENC_RGB},
};
bool v4l2_fwht_validate_fmt(const struct v4l2_fwht_pixfmt_info *info,
u32 width_div, u32 height_div, u32 components_num,
u32 pixenc)
{
if (info->width_div == width_div &&
info->height_div == height_div &&
(!pixenc || info->pixenc == pixenc) &&
info->components_num == components_num)
return true;
return false;
}
const struct v4l2_fwht_pixfmt_info *v4l2_fwht_find_nth_fmt(u32 width_div,
u32 height_div,
u32 components_num,
u32 pixenc,
unsigned int start_idx)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE(v4l2_fwht_pixfmts); i++) {
bool is_valid = v4l2_fwht_validate_fmt(&v4l2_fwht_pixfmts[i],
width_div, height_div,
components_num, pixenc);
if (is_valid) {
if (start_idx == 0)
return v4l2_fwht_pixfmts + i;
start_idx--;
}
}
return NULL;
}
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;
}
static int prepare_raw_frame(struct fwht_raw_frame *rf,
const struct v4l2_fwht_pixfmt_info *info, u8 *buf,
unsigned int size)
{
rf->luma = buf;
rf->width_div = info->width_div;
rf->height_div = info->height_div;
rf->luma_alpha_step = info->luma_alpha_step;
rf->chroma_step = info->chroma_step;
rf->alpha = NULL;
rf->components_num = info->components_num;
/*
* The buffer is NULL if it is the reference
* frame of an I-frame in the stateless decoder
*/
if (!buf) {
rf->luma = NULL;
rf->cb = NULL;
rf->cr = NULL;
rf->alpha = NULL;
return 0;
}
switch (info->id) {
case V4L2_PIX_FMT_GREY:
rf->cb = NULL;
rf->cr = NULL;
break;
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:
case V4L2_PIX_FMT_ARGB32:
rf->alpha = rf->luma;
rf->cr = rf->luma + 1;
rf->cb = rf->cr + 2;
rf->luma += 2;
break;
case V4L2_PIX_FMT_BGR32:
case V4L2_PIX_FMT_XBGR32:
case V4L2_PIX_FMT_ABGR32:
rf->cb = rf->luma;
rf->cr = rf->cb + 2;
rf->luma++;
rf->alpha = rf->cr + 1;
break;
case V4L2_PIX_FMT_BGRX32:
case V4L2_PIX_FMT_BGRA32:
rf->alpha = rf->luma;
rf->cb = rf->luma + 1;
rf->cr = rf->cb + 2;
rf->luma += 2;
break;
case V4L2_PIX_FMT_RGBX32:
case V4L2_PIX_FMT_RGBA32:
rf->alpha = rf->luma + 3;
rf->cr = rf->luma;
rf->cb = rf->cr + 2;
rf->luma++;
break;
default:
return -EINVAL;
}
return 0;
}
int v4l2_fwht_encode(struct v4l2_fwht_state *state, u8 *p_in, u8 *p_out)
{
unsigned int size = state->stride * state->coded_height;
unsigned int chroma_stride = state->stride;
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;
if (prepare_raw_frame(&rf, info, p_in, size))
return -EINVAL;
if (info->planes_num == 3)
chroma_stride /= 2;
if (info->id == V4L2_PIX_FMT_NV24 ||
info->id == V4L2_PIX_FMT_NV42)
chroma_stride *= 2;
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,
state->visible_width,
state->visible_height,
state->stride, chroma_stride);
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(state->visible_width);
p_hdr->height = htonl(state->visible_height);
flags |= (info->components_num - 1) << FWHT_FL_COMPONENTS_NUM_OFFSET;
flags |= info->pixenc;
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 (encoding & FWHT_ALPHA_UNENCODED)
flags |= FWHT_FL_ALPHA_IS_UNCOMPRESSED;
if (!(encoding & FWHT_FRAME_PCODED))
flags |= FWHT_FL_I_FRAME;
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);
return cf.size + sizeof(*p_hdr);
}
int v4l2_fwht_decode(struct v4l2_fwht_state *state, u8 *p_in, u8 *p_out)
{
u32 flags;
struct fwht_cframe cf;
unsigned int components_num = 3;
unsigned int version;
const struct v4l2_fwht_pixfmt_info *info;
unsigned int hdr_width_div, hdr_height_div;
struct fwht_raw_frame dst_rf;
unsigned int dst_chroma_stride = state->stride;
unsigned int ref_chroma_stride = state->ref_stride;
unsigned int dst_size = state->stride * state->coded_height;
unsigned int ref_size;
if (!state->info)
return -EINVAL;
info = state->info;
version = ntohl(state->header.version);
if (!version || version > FWHT_VERSION) {
pr_err("version %d is not supported, current version is %d\n",
version, FWHT_VERSION);
return -EINVAL;
}
if (state->header.magic1 != FWHT_MAGIC1 ||
state->header.magic2 != FWHT_MAGIC2)
return -EINVAL;
/* TODO: support resolution changes */
if (ntohl(state->header.width) != state->visible_width ||
ntohl(state->header.height) != state->visible_height)
return -EINVAL;
flags = ntohl(state->header.flags);
if (version >= 2) {
if ((flags & FWHT_FL_PIXENC_MSK) != info->pixenc)
return -EINVAL;
components_num = 1 + ((flags & FWHT_FL_COMPONENTS_NUM_MSK) >>
FWHT_FL_COMPONENTS_NUM_OFFSET);
}
if (components_num != info->components_num)
return -EINVAL;
state->colorspace = ntohl(state->header.colorspace);
state->xfer_func = ntohl(state->header.xfer_func);
state->ycbcr_enc = ntohl(state->header.ycbcr_enc);
state->quantization = ntohl(state->header.quantization);
cf.rlc_data = (__be16 *)p_in;
cf.size = ntohl(state->header.size);
hdr_width_div = (flags & FWHT_FL_CHROMA_FULL_WIDTH) ? 1 : 2;
hdr_height_div = (flags & FWHT_FL_CHROMA_FULL_HEIGHT) ? 1 : 2;
if (hdr_width_div != info->width_div ||
hdr_height_div != info->height_div)
return -EINVAL;
if (prepare_raw_frame(&dst_rf, info, p_out, dst_size))
return -EINVAL;
if (info->planes_num == 3) {
dst_chroma_stride /= 2;
ref_chroma_stride /= 2;
}
if (info->id == V4L2_PIX_FMT_NV24 ||
info->id == V4L2_PIX_FMT_NV42) {
dst_chroma_stride *= 2;
ref_chroma_stride *= 2;
}
ref_size = state->ref_stride * state->coded_height;
if (prepare_raw_frame(&state->ref_frame, info, state->ref_frame.buf,
ref_size))
return -EINVAL;
if (!fwht_decode_frame(&cf, flags, components_num,
state->visible_width, state->visible_height,
&state->ref_frame, state->ref_stride, ref_chroma_stride,
&dst_rf, state->stride, dst_chroma_stride))
return -EINVAL;
return 0;
}
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