mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-22 07:20:45 +00:00
304 lines
8.5 KiB
C
304 lines
8.5 KiB
C
/*
|
|
* Mirillis FIC decoder
|
|
*
|
|
* Copyright (c) 2014 Konstantin Shishkov
|
|
* Copyright (c) 2014 Derek Buitenhuis
|
|
*
|
|
* This file is part of Libav.
|
|
*
|
|
* Libav 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.
|
|
*
|
|
* Libav 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 Libav; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include "libavutil/common.h"
|
|
#include "avcodec.h"
|
|
#include "internal.h"
|
|
#include "dsputil.h"
|
|
#include "get_bits.h"
|
|
#include "golomb.h"
|
|
|
|
typedef struct FICThreadContext {
|
|
DECLARE_ALIGNED(16, int16_t, block)[64];
|
|
uint8_t *src;
|
|
int slice_h;
|
|
int src_size;
|
|
int y_off;
|
|
} FICThreadContext;
|
|
|
|
typedef struct FICContext {
|
|
AVCodecContext *avctx;
|
|
AVFrame *frame;
|
|
|
|
DSPContext dsp;
|
|
ScanTable scantable;
|
|
|
|
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;
|
|
} 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
|
|
|
|
static int fic_decode_block(FICContext *ctx, GetBitContext *gb,
|
|
uint8_t *dst, int stride, int16_t *block)
|
|
{
|
|
int i, num_coeff;
|
|
|
|
/* Is it a skip block? */
|
|
if (get_bits1(gb)) {
|
|
/* This is a P-frame. */
|
|
ctx->frame->key_frame = 0;
|
|
ctx->frame->pict_type = AV_PICTURE_TYPE_P;
|
|
|
|
return 0;
|
|
}
|
|
|
|
ctx->dsp.clear_block(block);
|
|
|
|
num_coeff = get_bits(gb, 7);
|
|
if (num_coeff > 64)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
for (i = 0; i < num_coeff; i++)
|
|
block[ctx->scantable.permutated[i]] = get_se_golomb(gb) * ctx->qmat[i];
|
|
|
|
ctx->dsp.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;
|
|
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;
|
|
|
|
init_get_bits(&gb, src, src_size * 8);
|
|
|
|
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)) != 0)
|
|
return ret;
|
|
}
|
|
|
|
dst += 8 * stride;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int fic_decode_frame(AVCodecContext *avctx, void *data,
|
|
int *got_frame, AVPacket *avpkt)
|
|
{
|
|
FICContext *ctx = avctx->priv_data;
|
|
uint8_t *src = avpkt->data;
|
|
int ret;
|
|
int slice, nslices;
|
|
int msize;
|
|
int tsize;
|
|
uint8_t *sdata;
|
|
|
|
if ((ret = ff_reget_buffer(avctx, ctx->frame)) < 0) {
|
|
av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
|
|
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])
|
|
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, "Invalid cursor data size.\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
/* 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 <= 0) {
|
|
av_log(avctx, AV_LOG_ERROR, "Not enough frame data to decode.\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
/*
|
|
* Set the frametype to I initially. It will be set to P if the frame
|
|
* has any dependencies (skip blocks). There will be a race condition
|
|
* inside the slice decode function to set these, but we do not care.
|
|
* since they will only ever be set to 0/P.
|
|
*/
|
|
ctx->frame->key_frame = 1;
|
|
ctx->frame->pict_type = AV_PICTURE_TYPE_I;
|
|
|
|
/* 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);
|
|
}
|
|
|
|
for (slice = 0; slice < nslices; slice++) {
|
|
int slice_off = AV_RB32(src + tsize + FIC_HEADER_SIZE + slice * 4);
|
|
int 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);
|
|
}
|
|
|
|
slice_size -= slice_off;
|
|
|
|
if (slice_off > msize || slice_off + slice_size > msize)
|
|
continue;
|
|
|
|
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;
|
|
|
|
skip:
|
|
*got_frame = 1;
|
|
if ((ret = av_frame_ref(data, ctx->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->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);
|
|
|
|
ff_dsputil_init(&ctx->dsp, avctx);
|
|
|
|
ff_init_scantable(ctx->dsp.idct_permutation, &ctx->scantable, ff_zigzag_direct);
|
|
|
|
return 0;
|
|
}
|
|
|
|
AVCodec ff_fic_decoder = {
|
|
.name = "fic",
|
|
.long_name = NULL_IF_CONFIG_SMALL("Mirillis FIC"),
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = AV_CODEC_ID_FIC,
|
|
.priv_data_size = sizeof(FICContext),
|
|
.init = fic_decode_init,
|
|
.decode = fic_decode_frame,
|
|
.close = fic_decode_close,
|
|
.capabilities = CODEC_CAP_DR1 | CODEC_CAP_SLICE_THREADS,
|
|
};
|