mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-12 19:18:44 +02:00
502 lines
16 KiB
C
502 lines
16 KiB
C
/*
|
|
* Infinity IMM4 decoder
|
|
*
|
|
* Copyright (c) 2018 Paul B Mahol
|
|
*
|
|
* 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 <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include "libavutil/thread.h"
|
|
|
|
#include "avcodec.h"
|
|
#include "bswapdsp.h"
|
|
#include "copy_block.h"
|
|
#include "get_bits.h"
|
|
#include "idctdsp.h"
|
|
#include "internal.h"
|
|
|
|
typedef struct IMM4Context {
|
|
BswapDSPContext bdsp;
|
|
GetBitContext gb;
|
|
|
|
AVFrame *prev_frame;
|
|
uint8_t *bitstream;
|
|
int bitstream_size;
|
|
|
|
int changed_size;
|
|
int factor;
|
|
unsigned sindex;
|
|
|
|
DECLARE_ALIGNED(32, int16_t, block)[6][64];
|
|
IDCTDSPContext idsp;
|
|
} IMM4Context;
|
|
|
|
static const uint8_t intra_cb[] = {
|
|
12, 9, 6
|
|
};
|
|
|
|
static const uint8_t inter_cb[] = {
|
|
30, 20, 15
|
|
};
|
|
|
|
static const uint8_t cbplo_symbols[] = {
|
|
3, 4, 19, 20, 35, 36, 51, 52
|
|
};
|
|
|
|
static const uint8_t cbplo_bits[] = {
|
|
1, 4, 3, 6, 3, 6, 3, 6
|
|
};
|
|
|
|
static const uint8_t cbplo_codes[] = {
|
|
1, 1, 1, 1, 2, 2, 3, 3
|
|
};
|
|
|
|
static const uint8_t cbphi_bits[] = {
|
|
4, 5, 5, 4, 5, 4, 6, 4, 5, 6, 4, 4, 4, 4, 4, 2
|
|
};
|
|
|
|
static const uint8_t cbphi_codes[] = {
|
|
3, 5, 4, 9, 3, 7, 2, 11, 2, 3, 5, 10, 4, 8, 6, 3
|
|
};
|
|
|
|
static const uint8_t blktype_symbols[] = {
|
|
0, 1, 2, 3, 4, 16, 17, 18, 19, 20, 32, 33, 34, 35, 48, 50, 51, 52
|
|
};
|
|
|
|
static const uint8_t blktype_bits[] = {
|
|
1, 3, 3, 5, 6, 4, 7, 7, 8, 9, 4, 7, 7, 8, 6, 8, 7, 9
|
|
};
|
|
|
|
static const uint8_t blktype_codes[] = {
|
|
1, 3, 2, 3, 4, 3, 7, 5, 4, 4, 2, 6, 4, 3, 5, 5, 3, 2
|
|
};
|
|
|
|
static const uint16_t block_symbols[] = {
|
|
0x0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8, 0x9, 0xA, 0xB, 0xC, 0x81, 0x82, 0x83,
|
|
0x84, 0x85, 0x86, 0x101, 0x102, 0x103, 0x104, 0x181, 0x182, 0x183, 0x201, 0x202,
|
|
0x203, 0x281, 0x282, 0x283, 0x301, 0x302, 0x303, 0x381, 0x382, 0x401, 0x402,
|
|
0x481, 0x482, 0x501, 0x502, 0x581, 0x601, 0x681, 0x701, 0x781, 0x801, 0x881,
|
|
0x901, 0x981, 0xA01, 0xA81, 0xB01, 0xB81, 0xC01, 0xC81, 0xD01, 0x4001, 0x4002,
|
|
0x4003, 0x4081, 0x4082, 0x4101, 0x4181, 0x4201, 0x4281, 0x4301, 0x4381, 0x4401,
|
|
0x4481, 0x4501, 0x4581, 0x4601, 0x4681, 0x4701, 0x4781, 0x4801, 0x4881, 0x4901,
|
|
0x4981, 0x4A01, 0x4A81, 0x4B01, 0x4B81, 0x4C01, 0x4C81, 0x4D01, 0x4D81, 0x4E01,
|
|
0x4E81, 0x4F01, 0x4F81, 0x5001, 0x5081, 0x5101, 0x5181, 0x5201, 0x5281, 0x5301,
|
|
0x5381, 0x5401
|
|
};
|
|
|
|
static const uint8_t block_bits[] = {
|
|
7, 2, 4, 6, 7, 8, 9, 9, 10, 10, 11, 11, 11, 3, 6, 8, 10, 11, 12, 4, 8,
|
|
10, 12, 5, 9, 10, 5, 9, 12, 5, 10, 12, 6, 10, 12, 6, 10, 6, 10, 6,
|
|
10, 7, 12, 7, 7, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 11, 11, 12, 12, 4, 9,
|
|
11, 6, 11, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9,
|
|
9, 9, 9, 9, 10, 10, 10, 10, 11, 11, 11, 11, 12, 12, 12, 12, 12, 12,
|
|
12, 12
|
|
};
|
|
|
|
static const uint8_t block_codes[] = {
|
|
3, 2, 15, 21, 23, 31, 37, 36, 33, 32, 7, 6, 32, 6, 20, 30, 15, 33, 80,
|
|
14, 29, 14, 81, 13, 35, 13, 12, 34, 82, 11, 12, 83, 19, 11, 84, 18,
|
|
10, 17, 9, 16, 8, 22, 85, 21, 20, 28, 27, 33, 32, 31, 30, 29, 28,
|
|
27, 26, 34, 35, 86, 87, 7, 25, 5, 15, 4, 14, 13, 12, 19, 18, 17, 16,
|
|
26, 25, 24, 23, 22, 21, 20, 19, 24, 23, 22, 21, 20, 19, 18, 17, 7,
|
|
6, 5, 4, 36, 37, 38, 39, 88, 89, 90, 91, 92, 93, 94, 95
|
|
};
|
|
|
|
static VLC cbplo_tab;
|
|
static VLC cbphi_tab;
|
|
static VLC blktype_tab;
|
|
static VLC block_tab;
|
|
|
|
static int get_cbphi(GetBitContext *gb, int x)
|
|
{
|
|
int value;
|
|
|
|
value = get_vlc2(gb, cbphi_tab.table, cbphi_tab.bits, 1);
|
|
if (value < 0)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
return x ? value : 15 - value;
|
|
}
|
|
|
|
static int decode_block(AVCodecContext *avctx, GetBitContext *gb,
|
|
int block, int factor, int flag)
|
|
{
|
|
IMM4Context *s = avctx->priv_data;
|
|
int i, last, len, factor2;
|
|
|
|
for (i = !flag; i < 64; i++) {
|
|
int value;
|
|
|
|
value = get_vlc2(gb, block_tab.table, block_tab.bits, 1);
|
|
if (value < 0)
|
|
return AVERROR_INVALIDDATA;
|
|
if (value == 0) {
|
|
last = get_bits1(gb);
|
|
len = get_bits(gb, 6);
|
|
factor2 = get_sbits(gb, 8);
|
|
} else {
|
|
factor2 = value & 0x7F;
|
|
last = (value >> 14) & 1;
|
|
len = (value >> 7) & 0x3F;
|
|
if (get_bits1(gb))
|
|
factor2 = -factor2;
|
|
}
|
|
i += len;
|
|
if (i >= 64)
|
|
break;
|
|
s->block[block][i] = factor * factor2;
|
|
if (last)
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int decode_blocks(AVCodecContext *avctx, GetBitContext *gb,
|
|
unsigned cbp, int flag)
|
|
{
|
|
IMM4Context *s = avctx->priv_data;
|
|
int ret, i;
|
|
|
|
memset(s->block, 0, sizeof(s->block));
|
|
|
|
for (i = 0; i < 6; i++) {
|
|
if (!flag) {
|
|
int x = get_bits(gb, 8);
|
|
|
|
if (x == 255)
|
|
x = 128;
|
|
x *= 8;
|
|
|
|
s->block[i][0] = x;
|
|
}
|
|
|
|
if (cbp & (1 << (5 - i))) {
|
|
ret = decode_block(avctx, gb, i, s->factor, flag);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int decode_intra(AVCodecContext *avctx, GetBitContext *gb, AVFrame *frame)
|
|
{
|
|
IMM4Context *s = avctx->priv_data;
|
|
int ret, x, y;
|
|
|
|
s->factor = intra_cb[s->sindex] * 2;
|
|
|
|
for (y = 0; y < avctx->height; y += 16) {
|
|
for (x = 0; x < avctx->width; x += 16) {
|
|
unsigned cbphi, cbplo;
|
|
|
|
cbplo = get_vlc2(gb, cbplo_tab.table, cbplo_tab.bits, 1) >> 4;
|
|
skip_bits1(gb);
|
|
|
|
cbphi = get_cbphi(gb, 1);
|
|
|
|
ret = decode_blocks(avctx, gb, cbplo | (cbphi << 2), 0);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
s->idsp.idct_put(frame->data[0] + y * frame->linesize[0] + x,
|
|
frame->linesize[0], s->block[0]);
|
|
s->idsp.idct_put(frame->data[0] + y * frame->linesize[0] + x + 8,
|
|
frame->linesize[0], s->block[1]);
|
|
s->idsp.idct_put(frame->data[0] + (y + 8) * frame->linesize[0] + x,
|
|
frame->linesize[0], s->block[2]);
|
|
s->idsp.idct_put(frame->data[0] + (y + 8) * frame->linesize[0] + x + 8,
|
|
frame->linesize[0], s->block[3]);
|
|
s->idsp.idct_put(frame->data[1] + (y >> 1) * frame->linesize[1] + (x >> 1),
|
|
frame->linesize[1], s->block[4]);
|
|
s->idsp.idct_put(frame->data[2] + (y >> 1) * frame->linesize[2] + (x >> 1),
|
|
frame->linesize[2], s->block[5]);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int decode_inter(AVCodecContext *avctx, GetBitContext *gb,
|
|
AVFrame *frame, AVFrame *prev)
|
|
{
|
|
IMM4Context *s = avctx->priv_data;
|
|
int ret, x, y;
|
|
|
|
s->factor = inter_cb[s->sindex];
|
|
|
|
for (y = 0; y < avctx->height; y += 16) {
|
|
for (x = 0; x < avctx->width; x += 16) {
|
|
int reverse, intra_block, value;
|
|
unsigned cbphi, cbplo;
|
|
|
|
if (get_bits1(gb)) {
|
|
copy_block16(frame->data[0] + y * frame->linesize[0] + x,
|
|
prev->data[0] + y * prev->linesize[0] + x,
|
|
frame->linesize[0], prev->linesize[0], 16);
|
|
copy_block8(frame->data[1] + (y >> 1) * frame->linesize[1] + (x >> 1),
|
|
prev->data[1] + (y >> 1) * prev->linesize[1] + (x >> 1),
|
|
frame->linesize[1], prev->linesize[1], 8);
|
|
copy_block8(frame->data[2] + (y >> 1) * frame->linesize[2] + (x >> 1),
|
|
prev->data[2] + (y >> 1) * prev->linesize[2] + (x >> 1),
|
|
frame->linesize[2], prev->linesize[2], 8);
|
|
continue;
|
|
}
|
|
|
|
value = get_vlc2(gb, blktype_tab.table, blktype_tab.bits, 1);
|
|
if (value < 0)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
intra_block = value & 0x07;
|
|
reverse = intra_block == 3;
|
|
if (reverse)
|
|
skip_bits1(gb);
|
|
|
|
cbplo = value >> 4;
|
|
cbphi = get_cbphi(gb, reverse);
|
|
if (intra_block) {
|
|
ret = decode_blocks(avctx, gb, cbplo | (cbphi << 2), 0);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
s->idsp.idct_put(frame->data[0] + y * frame->linesize[0] + x,
|
|
frame->linesize[0], s->block[0]);
|
|
s->idsp.idct_put(frame->data[0] + y * frame->linesize[0] + x + 8,
|
|
frame->linesize[0], s->block[1]);
|
|
s->idsp.idct_put(frame->data[0] + (y + 8) * frame->linesize[0] + x,
|
|
frame->linesize[0], s->block[2]);
|
|
s->idsp.idct_put(frame->data[0] + (y + 8) * frame->linesize[0] + x + 8,
|
|
frame->linesize[0], s->block[3]);
|
|
s->idsp.idct_put(frame->data[1] + (y >> 1) * frame->linesize[1] + (x >> 1),
|
|
frame->linesize[1], s->block[4]);
|
|
s->idsp.idct_put(frame->data[2] + (y >> 1) * frame->linesize[2] + (x >> 1),
|
|
frame->linesize[2], s->block[5]);
|
|
} else {
|
|
skip_bits(gb, 2);
|
|
ret = decode_blocks(avctx, gb, cbplo | (cbphi << 2), 1);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
copy_block16(frame->data[0] + y * frame->linesize[0] + x,
|
|
prev->data[0] + y * prev->linesize[0] + x,
|
|
frame->linesize[0], prev->linesize[0], 16);
|
|
copy_block8(frame->data[1] + (y >> 1) * frame->linesize[1] + (x >> 1),
|
|
prev->data[1] + (y >> 1) * prev->linesize[1] + (x >> 1),
|
|
frame->linesize[1], prev->linesize[1], 8);
|
|
copy_block8(frame->data[2] + (y >> 1) * frame->linesize[2] + (x >> 1),
|
|
prev->data[2] + (y >> 1) * prev->linesize[2] + (x >> 1),
|
|
frame->linesize[2], prev->linesize[2], 8);
|
|
|
|
s->idsp.idct_add(frame->data[0] + y * frame->linesize[0] + x,
|
|
frame->linesize[0], s->block[0]);
|
|
s->idsp.idct_add(frame->data[0] + y * frame->linesize[0] + x + 8,
|
|
frame->linesize[0], s->block[1]);
|
|
s->idsp.idct_add(frame->data[0] + (y + 8) * frame->linesize[0] + x,
|
|
frame->linesize[0], s->block[2]);
|
|
s->idsp.idct_add(frame->data[0] + (y + 8) * frame->linesize[0] + x + 8,
|
|
frame->linesize[0], s->block[3]);
|
|
s->idsp.idct_add(frame->data[1] + (y >> 1) * frame->linesize[1] + (x >> 1),
|
|
frame->linesize[1], s->block[4]);
|
|
s->idsp.idct_add(frame->data[2] + (y >> 1) * frame->linesize[2] + (x >> 1),
|
|
frame->linesize[2], s->block[5]);
|
|
}
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int decode_frame(AVCodecContext *avctx, void *data,
|
|
int *got_frame, AVPacket *avpkt)
|
|
{
|
|
IMM4Context *s = avctx->priv_data;
|
|
GetBitContext *gb = &s->gb;
|
|
AVFrame *frame = data;
|
|
unsigned type;
|
|
int ret, scaled;
|
|
|
|
if (avpkt->size <= 32)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
av_fast_padded_malloc(&s->bitstream, &s->bitstream_size,
|
|
FFALIGN(avpkt->size, 4));
|
|
if (!s->bitstream)
|
|
return AVERROR(ENOMEM);
|
|
|
|
s->bdsp.bswap_buf((uint32_t *)s->bitstream,
|
|
(uint32_t *)avpkt->data,
|
|
(avpkt->size + 3) >> 2);
|
|
|
|
if ((ret = init_get_bits8(gb, s->bitstream, FFALIGN(avpkt->size, 4))) < 0)
|
|
return ret;
|
|
|
|
avctx->pix_fmt = AV_PIX_FMT_YUV420P;
|
|
avctx->color_range = AVCOL_RANGE_JPEG;
|
|
|
|
scaled = avpkt->data[8];
|
|
if (scaled < 2) {
|
|
int width, height;
|
|
int mode = avpkt->data[10];
|
|
|
|
switch (mode) {
|
|
case 1:
|
|
width = 352;
|
|
height = 240;
|
|
break;
|
|
case 2:
|
|
width = 704;
|
|
height = 240;
|
|
break;
|
|
case 4:
|
|
width = 480;
|
|
height = 704;
|
|
break;
|
|
case 17:
|
|
width = 352;
|
|
height = 288;
|
|
break;
|
|
case 18:
|
|
width = 704;
|
|
height = 288;
|
|
break;
|
|
default:
|
|
width = 704;
|
|
height = 576;
|
|
break;
|
|
}
|
|
|
|
if (s->changed_size == 1 &&
|
|
(avctx->width != width || avctx->height != height)) {
|
|
av_log(avctx, AV_LOG_ERROR, "Frame size change is unsupported.\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
avctx->width = width;
|
|
avctx->height = height;
|
|
}
|
|
|
|
s->changed_size = 1;
|
|
skip_bits_long(gb, 24 * 8);
|
|
type = get_bits_long(gb, 32);
|
|
s->sindex = get_bits_long(gb, 32);
|
|
if (s->sindex > 2)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
switch (type) {
|
|
case 0x19781977:
|
|
frame->key_frame = 1;
|
|
frame->pict_type = AV_PICTURE_TYPE_I;
|
|
break;
|
|
case 0x12250926:
|
|
frame->key_frame = 0;
|
|
frame->pict_type = AV_PICTURE_TYPE_P;
|
|
break;
|
|
default:
|
|
avpriv_request_sample(avctx, "type %X", type);
|
|
return AVERROR_PATCHWELCOME;
|
|
}
|
|
|
|
if ((ret = ff_get_buffer(avctx, frame, frame->key_frame ? AV_GET_BUFFER_FLAG_REF : 0)) < 0)
|
|
return ret;
|
|
|
|
if (frame->key_frame) {
|
|
ret = decode_intra(avctx, gb, frame);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
av_frame_unref(s->prev_frame);
|
|
if ((ret = av_frame_ref(s->prev_frame, frame)) < 0)
|
|
return ret;
|
|
} else {
|
|
if (!s->prev_frame->data[0]) {
|
|
av_log(avctx, AV_LOG_ERROR, "Missing reference frame.\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
ret = decode_inter(avctx, gb, frame, s->prev_frame);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
*got_frame = 1;
|
|
|
|
return avpkt->size;
|
|
}
|
|
|
|
static av_cold void imm4_init_static_data(void)
|
|
{
|
|
INIT_VLC_SPARSE_STATIC(&cbplo_tab, 9, FF_ARRAY_ELEMS(cbplo_bits),
|
|
cbplo_bits, 1, 1, cbplo_codes, 1, 1, cbplo_symbols, 1, 1, 512);
|
|
|
|
INIT_VLC_SPARSE_STATIC(&cbphi_tab, 6, FF_ARRAY_ELEMS(cbphi_bits),
|
|
cbphi_bits, 1, 1, cbphi_codes, 1, 1, NULL, 0, 0, 64);
|
|
|
|
INIT_VLC_SPARSE_STATIC(&blktype_tab, 9, FF_ARRAY_ELEMS(blktype_bits),
|
|
blktype_bits, 1, 1, blktype_codes, 1, 1, blktype_symbols, 1, 1, 512);
|
|
|
|
INIT_VLC_SPARSE_STATIC(&block_tab, 12, FF_ARRAY_ELEMS(block_bits),
|
|
block_bits, 1, 1, block_codes, 1, 1, block_symbols, 2, 2, 4096);
|
|
}
|
|
|
|
static av_cold int decode_init(AVCodecContext *avctx)
|
|
{
|
|
static AVOnce init_static_once = AV_ONCE_INIT;
|
|
IMM4Context *s = avctx->priv_data;
|
|
|
|
avctx->idct_algo = FF_IDCT_FAAN;
|
|
ff_bswapdsp_init(&s->bdsp);
|
|
ff_idctdsp_init(&s->idsp, avctx);
|
|
|
|
s->prev_frame = av_frame_alloc();
|
|
if (!s->prev_frame)
|
|
return AVERROR(ENOMEM);
|
|
|
|
ff_thread_once(&init_static_once, imm4_init_static_data);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static av_cold int decode_close(AVCodecContext *avctx)
|
|
{
|
|
IMM4Context *s = avctx->priv_data;
|
|
|
|
av_frame_free(&s->prev_frame);
|
|
av_freep(&s->bitstream);
|
|
s->bitstream_size = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
AVCodec ff_imm4_decoder = {
|
|
.name = "imm4",
|
|
.long_name = NULL_IF_CONFIG_SMALL("Infinity IMM4"),
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = AV_CODEC_ID_IMM4,
|
|
.priv_data_size = sizeof(IMM4Context),
|
|
.init = decode_init,
|
|
.close = decode_close,
|
|
.decode = decode_frame,
|
|
.capabilities = AV_CODEC_CAP_DR1,
|
|
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE |
|
|
FF_CODEC_CAP_INIT_CLEANUP,
|
|
};
|