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ffmpeg/libavcodec/fic.c
Andreas Rheinhardt 790f793844 avutil/common: Don't auto-include mem.h 
There are lots of files that don't need it: The number of object
files that actually need it went down from 2011 to 884 here.

Keep it for external users in order to not cause breakages.

Also improve the other headers a bit while just at it.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2024-03-31 00:08:43 +01:00

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/*
* Mirillis FIC decoder
*
* Copyright (c) 2014 Konstantin Shishkov
* Copyright (c) 2014 Derek Buitenhuis
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/common.h"
#include "libavutil/mem.h"
#include "libavutil/mem_internal.h"
#include "libavutil/opt.h"
#include "avcodec.h"
#include "codec_internal.h"
#include "decode.h"
#include "get_bits.h"
#include "golomb.h"
typedef struct FICThreadContext {
DECLARE_ALIGNED(16, int16_t, block)[64];
const uint8_t *src;
int slice_h;
int src_size;
int y_off;
int p_frame;
} FICThreadContext;
typedef struct FICContext {
AVClass *class;
AVCodecContext *avctx;
AVFrame *frame;
AVFrame *final_frame;
FICThreadContext *slice_data;
int slice_data_size;
const uint8_t *qmat;
enum AVPictureType cur_frame_type;
int aligned_width, aligned_height;
int num_slices, slice_h;
uint8_t cursor_buf[4096];
int skip_cursor;
} FICContext;
static const uint8_t fic_qmat_hq[64] = {
1, 2, 2, 2, 3, 3, 3, 4,
2, 2, 2, 3, 3, 3, 4, 4,
2, 2, 3, 3, 3, 4, 4, 4,
2, 2, 3, 3, 3, 4, 4, 5,
2, 3, 3, 3, 4, 4, 5, 6,
3, 3, 3, 4, 4, 5, 6, 7,
3, 3, 3, 4, 4, 5, 7, 7,
3, 3, 4, 4, 5, 7, 7, 7,
};
static const uint8_t fic_qmat_lq[64] = {
1, 5, 6, 7, 8, 9, 9, 11,
5, 5, 7, 8, 9, 9, 11, 12,
6, 7, 8, 9, 9, 11, 11, 12,
7, 7, 8, 9, 9, 11, 12, 13,
7, 8, 9, 9, 10, 11, 13, 16,
8, 9, 9, 10, 11, 13, 16, 19,
8, 9, 9, 11, 12, 15, 18, 23,
9, 9, 11, 12, 15, 18, 23, 27
};
static const uint8_t fic_header[7] = { 0, 0, 1, 'F', 'I', 'C', 'V' };
#define FIC_HEADER_SIZE 27
#define CURSOR_OFFSET 59
static av_always_inline void fic_idct(int16_t *blk, int step, int shift, int rnd)
{
const unsigned t0 = 27246 * blk[3 * step] + 18405 * blk[5 * step];
const unsigned t1 = 27246 * blk[5 * step] - 18405 * blk[3 * step];
const unsigned t2 = 6393 * blk[7 * step] + 32139 * blk[1 * step];
const unsigned t3 = 6393 * blk[1 * step] - 32139 * blk[7 * step];
const unsigned t4 = 5793U * ((int)(t2 + t0 + 0x800) >> 12);
const unsigned t5 = 5793U * ((int)(t3 + t1 + 0x800) >> 12);
const unsigned t6 = t2 - t0;
const unsigned t7 = t3 - t1;
const unsigned t8 = 17734 * blk[2 * step] - 42813 * blk[6 * step];
const unsigned t9 = 17734 * blk[6 * step] + 42814 * blk[2 * step];
const unsigned tA = (blk[0 * step] - blk[4 * step]) * 32768 + rnd;
const unsigned tB = (blk[0 * step] + blk[4 * step]) * 32768 + rnd;
blk[0 * step] = (int)( t4 + t9 + tB) >> shift;
blk[1 * step] = (int)( t6 + t7 + t8 + tA) >> shift;
blk[2 * step] = (int)( t6 - t7 - t8 + tA) >> shift;
blk[3 * step] = (int)( t5 - t9 + tB) >> shift;
blk[4 * step] = (int)( -t5 - t9 + tB) >> shift;
blk[5 * step] = (int)(-(t6 - t7) - t8 + tA) >> shift;
blk[6 * step] = (int)(-(t6 + t7) + t8 + tA) >> shift;
blk[7 * step] = (int)( -t4 + t9 + tB) >> shift;
}
static void fic_idct_put(uint8_t *dst, int stride, int16_t *block)
{
int i, j;
int16_t *ptr;
ptr = block;
fic_idct(ptr++, 8, 13, (1 << 12) + (1 << 17));
for (i = 1; i < 8; i++) {
fic_idct(ptr, 8, 13, 1 << 12);
ptr++;
}
ptr = block;
for (i = 0; i < 8; i++) {
fic_idct(ptr, 1, 20, 0);
ptr += 8;
}
ptr = block;
for (j = 0; j < 8; j++) {
for (i = 0; i < 8; i++)
dst[i] = av_clip_uint8(ptr[i]);
dst += stride;
ptr += 8;
}
}
static int fic_decode_block(FICContext *ctx, GetBitContext *gb,
uint8_t *dst, int stride, int16_t *block, int *is_p)
{
int i, num_coeff;
if (get_bits_left(gb) < 8)
return AVERROR_INVALIDDATA;
/* Is it a skip block? */
if (get_bits1(gb)) {
*is_p = 1;
return 0;
}
memset(block, 0, sizeof(*block) * 64);
num_coeff = get_bits(gb, 7);
if (num_coeff > 64)
return AVERROR_INVALIDDATA;
for (i = 0; i < num_coeff; i++) {
int v = get_se_golomb(gb);
if (v < -2048 || v > 2048)
return AVERROR_INVALIDDATA;
block[ff_zigzag_direct[i]] = v *
ctx->qmat[ff_zigzag_direct[i]];
}
fic_idct_put(dst, stride, block);
return 0;
}
static int fic_decode_slice(AVCodecContext *avctx, void *tdata)
{
FICContext *ctx = avctx->priv_data;
FICThreadContext *tctx = tdata;
GetBitContext gb;
const uint8_t *src = tctx->src;
int slice_h = tctx->slice_h;
int src_size = tctx->src_size;
int y_off = tctx->y_off;
int x, y, p, ret;
ret = init_get_bits8(&gb, src, src_size);
if (ret < 0)
return ret;
for (p = 0; p < 3; p++) {
int stride = ctx->frame->linesize[p];
uint8_t* dst = ctx->frame->data[p] + (y_off >> !!p) * stride;
for (y = 0; y < (slice_h >> !!p); y += 8) {
for (x = 0; x < (ctx->aligned_width >> !!p); x += 8) {
int ret;
if ((ret = fic_decode_block(ctx, &gb, dst + x, stride,
tctx->block, &tctx->p_frame)) != 0)
return ret;
}
dst += 8 * stride;
}
}
return 0;
}
static av_always_inline void fic_alpha_blend(uint8_t *dst, uint8_t *src,
int size, uint8_t *alpha)
{
int i;
for (i = 0; i < size; i++)
dst[i] += ((src[i] - dst[i]) * alpha[i]) >> 8;
}
static void fic_draw_cursor(AVCodecContext *avctx, int cur_x, int cur_y)
{
FICContext *ctx = avctx->priv_data;
uint8_t *ptr = ctx->cursor_buf;
uint8_t *dstptr[3];
uint8_t planes[4][1024];
uint8_t chroma[3][256];
int i, j, p;
/* Convert to YUVA444. */
for (i = 0; i < 1024; i++) {
planes[0][i] = (( 25 * ptr[0] + 129 * ptr[1] + 66 * ptr[2]) / 255) + 16;
planes[1][i] = ((-38 * ptr[0] + 112 * ptr[1] + -74 * ptr[2]) / 255) + 128;
planes[2][i] = ((-18 * ptr[0] + 112 * ptr[1] + -94 * ptr[2]) / 255) + 128;
planes[3][i] = ptr[3];
ptr += 4;
}
/* Subsample chroma. */
for (i = 0; i < 32; i += 2)
for (j = 0; j < 32; j += 2)
for (p = 0; p < 3; p++)
chroma[p][16 * (i / 2) + j / 2] = (planes[p + 1][32 * i + j ] +
planes[p + 1][32 * i + j + 1] +
planes[p + 1][32 * (i + 1) + j ] +
planes[p + 1][32 * (i + 1) + j + 1]) / 4;
/* Seek to x/y pos of cursor. */
for (i = 0; i < 3; i++)
dstptr[i] = ctx->final_frame->data[i] +
(ctx->final_frame->linesize[i] * (cur_y >> !!i)) +
(cur_x >> !!i) + !!i;
/* Copy. */
for (i = 0; i < FFMIN(32, avctx->height - cur_y) - 1; i += 2) {
int lsize = FFMIN(32, avctx->width - cur_x);
int csize = lsize / 2;
fic_alpha_blend(dstptr[0],
planes[0] + i * 32, lsize, planes[3] + i * 32);
fic_alpha_blend(dstptr[0] + ctx->final_frame->linesize[0],
planes[0] + (i + 1) * 32, lsize, planes[3] + (i + 1) * 32);
fic_alpha_blend(dstptr[1],
chroma[0] + (i / 2) * 16, csize, chroma[2] + (i / 2) * 16);
fic_alpha_blend(dstptr[2],
chroma[1] + (i / 2) * 16, csize, chroma[2] + (i / 2) * 16);
dstptr[0] += ctx->final_frame->linesize[0] * 2;
dstptr[1] += ctx->final_frame->linesize[1];
dstptr[2] += ctx->final_frame->linesize[2];
}
}
static int fic_decode_frame(AVCodecContext *avctx, AVFrame *rframe,
int *got_frame, AVPacket *avpkt)
{
FICContext *ctx = avctx->priv_data;
const uint8_t *src = avpkt->data;
int ret;
int slice, nslices;
int msize;
int tsize;
int cur_x, cur_y;
int skip_cursor = ctx->skip_cursor;
const uint8_t *sdata;
if ((ret = ff_reget_buffer(avctx, ctx->frame, 0)) < 0)
return ret;
/* Header + at least one slice (4) */
if (avpkt->size < FIC_HEADER_SIZE + 4) {
av_log(avctx, AV_LOG_ERROR, "Frame data is too small.\n");
return AVERROR_INVALIDDATA;
}
/* Check for header. */
if (memcmp(src, fic_header, 7))
av_log(avctx, AV_LOG_WARNING, "Invalid FIC Header.\n");
/* Is it a skip frame? */
if (src[17]) {
if (!ctx->final_frame) {
av_log(avctx, AV_LOG_WARNING, "Initial frame is skipped\n");
return AVERROR_INVALIDDATA;
}
goto skip;
}
nslices = src[13];
if (!nslices) {
av_log(avctx, AV_LOG_ERROR, "Zero slices found.\n");
return AVERROR_INVALIDDATA;
}
/* High or Low Quality Matrix? */
ctx->qmat = src[23] ? fic_qmat_hq : fic_qmat_lq;
/* Skip cursor data. */
tsize = AV_RB24(src + 24);
if (tsize > avpkt->size - FIC_HEADER_SIZE) {
av_log(avctx, AV_LOG_ERROR,
"Packet is too small to contain cursor (%d vs %d bytes).\n",
tsize, avpkt->size - FIC_HEADER_SIZE);
return AVERROR_INVALIDDATA;
}
if (!tsize || !AV_RL16(src + 37) || !AV_RL16(src + 39))
skip_cursor = 1;
if (!skip_cursor && tsize < 32) {
av_log(avctx, AV_LOG_WARNING,
"Cursor data too small. Skipping cursor.\n");
skip_cursor = 1;
}
/* Cursor position. */
cur_x = AV_RL16(src + 33);
cur_y = AV_RL16(src + 35);
if (!skip_cursor && (cur_x > avctx->width || cur_y > avctx->height)) {
av_log(avctx, AV_LOG_DEBUG,
"Invalid cursor position: (%d,%d). Skipping cursor.\n",
cur_x, cur_y);
skip_cursor = 1;
}
if (!skip_cursor && (AV_RL16(src + 37) != 32 || AV_RL16(src + 39) != 32)) {
av_log(avctx, AV_LOG_WARNING,
"Invalid cursor size. Skipping cursor.\n");
skip_cursor = 1;
}
if (!skip_cursor && avpkt->size < CURSOR_OFFSET + sizeof(ctx->cursor_buf)) {
skip_cursor = 1;
}
/* Slice height for all but the last slice. */
ctx->slice_h = 16 * (ctx->aligned_height >> 4) / nslices;
if (ctx->slice_h % 16)
ctx->slice_h = FFALIGN(ctx->slice_h - 16, 16);
/* First slice offset and remaining data. */
sdata = src + tsize + FIC_HEADER_SIZE + 4 * nslices;
msize = avpkt->size - nslices * 4 - tsize - FIC_HEADER_SIZE;
if (msize <= ctx->aligned_width/8 * (ctx->aligned_height/8) / 8) {
av_log(avctx, AV_LOG_ERROR, "Not enough frame data to decode.\n");
return AVERROR_INVALIDDATA;
}
/* Allocate slice data. */
av_fast_malloc(&ctx->slice_data, &ctx->slice_data_size,
nslices * sizeof(ctx->slice_data[0]));
if (!ctx->slice_data_size) {
av_log(avctx, AV_LOG_ERROR, "Could not allocate slice data.\n");
return AVERROR(ENOMEM);
}
memset(ctx->slice_data, 0, nslices * sizeof(ctx->slice_data[0]));
for (slice = 0; slice < nslices; slice++) {
unsigned slice_off = AV_RB32(src + tsize + FIC_HEADER_SIZE + slice * 4);
unsigned slice_size;
int y_off = ctx->slice_h * slice;
int slice_h = ctx->slice_h;
/*
* Either read the slice size, or consume all data left.
* Also, special case the last slight height.
*/
if (slice == nslices - 1) {
slice_size = msize;
slice_h = FFALIGN(avctx->height - ctx->slice_h * (nslices - 1), 16);
} else {
slice_size = AV_RB32(src + tsize + FIC_HEADER_SIZE + slice * 4 + 4);
if (slice_size < slice_off)
return AVERROR_INVALIDDATA;
}
if (slice_size < slice_off || slice_size > msize)
continue;
slice_size -= slice_off;
ctx->slice_data[slice].src = sdata + slice_off;
ctx->slice_data[slice].src_size = slice_size;
ctx->slice_data[slice].slice_h = slice_h;
ctx->slice_data[slice].y_off = y_off;
}
if ((ret = avctx->execute(avctx, fic_decode_slice, ctx->slice_data,
NULL, nslices, sizeof(ctx->slice_data[0]))) < 0)
return ret;
ctx->frame->flags |= AV_FRAME_FLAG_KEY;
ctx->frame->pict_type = AV_PICTURE_TYPE_I;
for (slice = 0; slice < nslices; slice++) {
if (ctx->slice_data[slice].p_frame) {
ctx->frame->flags &= ~AV_FRAME_FLAG_KEY;
ctx->frame->pict_type = AV_PICTURE_TYPE_P;
break;
}
}
av_frame_free(&ctx->final_frame);
ctx->final_frame = av_frame_clone(ctx->frame);
if (!ctx->final_frame) {
av_log(avctx, AV_LOG_ERROR, "Could not clone frame buffer.\n");
return AVERROR(ENOMEM);
}
/* Make sure we use a user-supplied buffer. */
if ((ret = ff_reget_buffer(avctx, ctx->final_frame, 0)) < 0) {
av_log(avctx, AV_LOG_ERROR, "Could not make frame writable.\n");
return ret;
}
/* Draw cursor. */
if (!skip_cursor) {
memcpy(ctx->cursor_buf, src + CURSOR_OFFSET, sizeof(ctx->cursor_buf));
fic_draw_cursor(avctx, cur_x, cur_y);
}
skip:
*got_frame = 1;
if ((ret = av_frame_ref(rframe, ctx->final_frame)) < 0)
return ret;
return avpkt->size;
}
static av_cold int fic_decode_close(AVCodecContext *avctx)
{
FICContext *ctx = avctx->priv_data;
av_freep(&ctx->slice_data);
av_frame_free(&ctx->final_frame);
av_frame_free(&ctx->frame);
return 0;
}
static av_cold int fic_decode_init(AVCodecContext *avctx)
{
FICContext *ctx = avctx->priv_data;
/* Initialize various context values */
ctx->avctx = avctx;
ctx->aligned_width = FFALIGN(avctx->width, 16);
ctx->aligned_height = FFALIGN(avctx->height, 16);
avctx->pix_fmt = AV_PIX_FMT_YUV420P;
avctx->bits_per_raw_sample = 8;
ctx->frame = av_frame_alloc();
if (!ctx->frame)
return AVERROR(ENOMEM);
return 0;
}
static const AVOption options[] = {
{ "skip_cursor", "skip the cursor", offsetof(FICContext, skip_cursor), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM },
{ NULL },
};
static const AVClass fic_decoder_class = {
.class_name = "FIC decoder",
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
};
const FFCodec ff_fic_decoder = {
.p.name = "fic",
CODEC_LONG_NAME("Mirillis FIC"),
.p.type = AVMEDIA_TYPE_VIDEO,
.p.id = AV_CODEC_ID_FIC,
.priv_data_size = sizeof(FICContext),
.init = fic_decode_init,
FF_CODEC_DECODE_CB(fic_decode_frame),
.close = fic_decode_close,
.p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_SLICE_THREADS,
.p.priv_class = &fic_decoder_class,
};
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