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/* |
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* Canopus HQX decoder |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include <inttypes.h> |
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#include "libavutil/imgutils.h" |
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#include "libavutil/intreadwrite.h" |
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#include "avcodec.h" |
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#include "canopus.h" |
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#include "get_bits.h" |
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#include "internal.h" |
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#include "thread.h" |
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#include "hqx.h" |
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#include "hqxdsp.h" |
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/* HQX has four modes - 422, 444, 422alpha and 444alpha - all 12-bit */ |
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enum HQXFormat { |
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HQX_422 = 0, |
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HQX_444, |
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HQX_422A, |
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HQX_444A, |
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}; |
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#define HQX_HEADER_SIZE 59 |
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/* macroblock selects a group of 4 possible quants and |
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* a block can use any of those four quantisers |
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* one column is powers of 2, the other one is powers of 2 * 3, |
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* then there is the special one, powers of 2 * 5 */ |
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static const int hqx_quants[16][4] = { |
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{ 0x1, 0x2, 0x4, 0x8 }, { 0x1, 0x3, 0x6, 0xC }, |
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{ 0x2, 0x4, 0x8, 0x10 }, { 0x3, 0x6, 0xC, 0x18 }, |
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{ 0x4, 0x8, 0x10, 0x20 }, { 0x6, 0xC, 0x18, 0x30 }, |
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{ 0x8, 0x10, 0x20, 0x40 }, |
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{ 0xA, 0x14, 0x28, 0x50 }, |
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{ 0xC, 0x18, 0x30, 0x60 }, |
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{ 0x10, 0x20, 0x40, 0x80 }, { 0x18, 0x30, 0x60, 0xC0 }, |
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{ 0x20, 0x40, 0x80, 0x100 }, { 0x30, 0x60, 0xC0, 0x180 }, |
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{ 0x40, 0x80, 0x100, 0x200 }, { 0x60, 0xC0, 0x180, 0x300 }, |
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{ 0x80, 0x100, 0x200, 0x400 } |
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}; |
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static const uint8_t hqx_quant_luma[64] = { |
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16, 16, 16, 19, 19, 19, 42, 44, |
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16, 16, 19, 19, 19, 38, 43, 45, |
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16, 19, 19, 19, 40, 41, 45, 48, |
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19, 19, 19, 40, 41, 42, 46, 49, |
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19, 19, 40, 41, 42, 43, 48, 101, |
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19, 38, 41, 42, 43, 44, 98, 104, |
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42, 43, 45, 46, 48, 98, 109, 116, |
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44, 45, 48, 49, 101, 104, 116, 123, |
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}; |
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static const uint8_t hqx_quant_chroma[64] = { |
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16, 16, 19, 25, 26, 26, 42, 44, |
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16, 19, 25, 25, 26, 38, 43, 91, |
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19, 25, 26, 27, 40, 41, 91, 96, |
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25, 25, 27, 40, 41, 84, 93, 197, |
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26, 26, 40, 41, 84, 86, 191, 203, |
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26, 38, 41, 84, 86, 177, 197, 209, |
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42, 43, 91, 93, 191, 197, 219, 232, |
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44, 91, 96, 197, 203, 209, 232, 246, |
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}; |
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110880 |
static inline void put_blocks(HQXContext *ctx, int plane, |
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int x, int y, int ilace, |
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int16_t *block0, int16_t *block1, |
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const uint8_t *quant) |
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{ |
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✓✓ |
110880 |
int fields = ilace ? 2 : 1; |
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110880 |
int lsize = ctx->pic->linesize[plane]; |
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110880 |
uint8_t *p = ctx->pic->data[plane] + x * 2; |
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110880 |
ctx->hqxdsp.idct_put((uint16_t *)(p + y * lsize), |
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110880 |
lsize * fields, block0, quant); |
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110880 |
ctx->hqxdsp.idct_put((uint16_t *)(p + (y + (ilace ? 1 : 8)) * lsize), |
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✓✓ |
110880 |
lsize * fields, block1, quant); |
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110880 |
} |
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2674300 |
static inline void hqx_get_ac(GetBitContext *gb, const HQXAC *ac, |
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int *run, int *lev) |
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{ |
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int val; |
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2674300 |
val = show_bits(gb, ac->lut_bits); |
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✓✓ |
2674300 |
if (ac->lut[val].bits == -1) { |
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108610 |
GetBitContext gb2 = *gb; |
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108610 |
skip_bits(&gb2, ac->lut_bits); |
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108610 |
val = ac->lut[val].lev + show_bits(&gb2, ac->extra_bits); |
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} |
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2674300 |
*run = ac->lut[val].run; |
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2674300 |
*lev = ac->lut[val].lev; |
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2674300 |
skip_bits(gb, ac->lut[val].bits); |
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2674300 |
} |
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144104 |
static int decode_block(GetBitContext *gb, VLC *vlc, |
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const int *quants, int dcb, |
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int16_t block[64], int *last_dc) |
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{ |
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int q, dc; |
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int ac_idx; |
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144104 |
int run, lev, pos = 1; |
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memset(block, 0, 64 * sizeof(*block)); |
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dc = get_vlc2(gb, vlc->table, HQX_DC_VLC_BITS, 2); |
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*last_dc += dc; |
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127 |
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block[0] = sign_extend(*last_dc << (12 - dcb), 12); |
128 |
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q = quants[get_bits(gb, 2)]; |
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✗✓ |
144104 |
if (q >= 128) |
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ac_idx = HQX_AC_Q128; |
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✗✓ |
144104 |
else if (q >= 64) |
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ac_idx = HQX_AC_Q64; |
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✗✓ |
144104 |
else if (q >= 32) |
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ac_idx = HQX_AC_Q32; |
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✗✓ |
144104 |
else if (q >= 16) |
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ac_idx = HQX_AC_Q16; |
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✓✓ |
144104 |
else if (q >= 8) |
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ac_idx = HQX_AC_Q8; |
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else |
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144090 |
ac_idx = HQX_AC_Q0; |
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do { |
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2674300 |
hqx_get_ac(gb, &ff_hqx_ac[ac_idx], &run, &lev); |
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2674300 |
pos += run; |
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✓✓ |
2674300 |
if (pos >= 64) |
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140780 |
break; |
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2533520 |
block[ff_zigzag_direct[pos++]] = lev * q; |
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✓✓ |
2533520 |
} while (pos < 64); |
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144104 |
return 0; |
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} |
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154 |
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3240 |
static int hqx_decode_422(HQXContext *ctx, int slice_no, int x, int y) |
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{ |
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3240 |
HQXSlice *slice = &ctx->slice[slice_no]; |
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3240 |
GetBitContext *gb = &slice->gb; |
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const int *quants; |
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int flag; |
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int last_dc; |
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int i, ret; |
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✓✗ |
3240 |
if (ctx->interlaced) |
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3240 |
flag = get_bits1(gb); |
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else |
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flag = 0; |
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quants = hqx_quants[get_bits(gb, 4)]; |
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✓✓ |
29160 |
for (i = 0; i < 8; i++) { |
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25920 |
int vlc_index = ctx->dcb - 9; |
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✓✓✓✓ ✓✓ |
25920 |
if (i == 0 || i == 4 || i == 6) |
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last_dc = 0; |
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ret = decode_block(gb, &ctx->dc_vlc[vlc_index], quants, |
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ctx->dcb, slice->block[i], &last_dc); |
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✗✓ |
25920 |
if (ret < 0) |
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return ret; |
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} |
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180 |
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put_blocks(ctx, 0, x, y, flag, slice->block[0], slice->block[2], hqx_quant_luma); |
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put_blocks(ctx, 0, x + 8, y, flag, slice->block[1], slice->block[3], hqx_quant_luma); |
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put_blocks(ctx, 2, x >> 1, y, flag, slice->block[4], slice->block[5], hqx_quant_chroma); |
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put_blocks(ctx, 1, x >> 1, y, flag, slice->block[6], slice->block[7], hqx_quant_chroma); |
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3240 |
return 0; |
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} |
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16320 |
static int hqx_decode_422a(HQXContext *ctx, int slice_no, int x, int y) |
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{ |
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16320 |
HQXSlice *slice = &ctx->slice[slice_no]; |
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16320 |
GetBitContext *gb = &slice->gb; |
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const int *quants; |
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16320 |
int flag = 0; |
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int last_dc; |
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int i, ret; |
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int cbp; |
197 |
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198 |
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16320 |
cbp = get_vlc2(gb, ctx->cbp_vlc.table, HQX_CBP_VLC_BITS, 1); |
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200 |
✓✓ |
212160 |
for (i = 0; i < 12; i++) |
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195840 |
memset(slice->block[i], 0, sizeof(**slice->block) * 64); |
202 |
✓✓ |
212160 |
for (i = 0; i < 12; i++) |
203 |
|
195840 |
slice->block[i][0] = -0x800; |
204 |
✓✓ |
16320 |
if (cbp) { |
205 |
✓✗ |
9986 |
if (ctx->interlaced) |
206 |
|
9986 |
flag = get_bits1(gb); |
207 |
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208 |
|
9986 |
quants = hqx_quants[get_bits(gb, 4)]; |
209 |
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|
210 |
|
9986 |
cbp |= cbp << 4; // alpha CBP |
211 |
✓✓ |
9986 |
if (cbp & 0x3) // chroma CBP - top |
212 |
|
9896 |
cbp |= 0x500; |
213 |
✓✓ |
9986 |
if (cbp & 0xC) // chroma CBP - bottom |
214 |
|
9878 |
cbp |= 0xA00; |
215 |
✓✓ |
129818 |
for (i = 0; i < 12; i++) { |
216 |
✓✓✓✓ ✓✓✓✓
|
119832 |
if (i == 0 || i == 4 || i == 8 || i == 10) |
217 |
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39944 |
last_dc = 0; |
218 |
✓✓ |
119832 |
if (cbp & (1 << i)) { |
219 |
|
118184 |
int vlc_index = ctx->dcb - 9; |
220 |
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118184 |
ret = decode_block(gb, &ctx->dc_vlc[vlc_index], quants, |
221 |
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118184 |
ctx->dcb, slice->block[i], &last_dc); |
222 |
✗✓ |
118184 |
if (ret < 0) |
223 |
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return ret; |
224 |
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} |
225 |
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} |
226 |
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} |
227 |
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228 |
|
16320 |
put_blocks(ctx, 3, x, y, flag, slice->block[ 0], slice->block[ 2], hqx_quant_luma); |
229 |
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16320 |
put_blocks(ctx, 3, x + 8, y, flag, slice->block[ 1], slice->block[ 3], hqx_quant_luma); |
230 |
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16320 |
put_blocks(ctx, 0, x, y, flag, slice->block[ 4], slice->block[ 6], hqx_quant_luma); |
231 |
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16320 |
put_blocks(ctx, 0, x + 8, y, flag, slice->block[ 5], slice->block[ 7], hqx_quant_luma); |
232 |
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16320 |
put_blocks(ctx, 2, x >> 1, y, flag, slice->block[ 8], slice->block[ 9], hqx_quant_chroma); |
233 |
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16320 |
put_blocks(ctx, 1, x >> 1, y, flag, slice->block[10], slice->block[11], hqx_quant_chroma); |
234 |
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235 |
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16320 |
return 0; |
236 |
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} |
237 |
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238 |
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static int hqx_decode_444(HQXContext *ctx, int slice_no, int x, int y) |
239 |
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{ |
240 |
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HQXSlice *slice = &ctx->slice[slice_no]; |
241 |
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GetBitContext *gb = &slice->gb; |
242 |
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const int *quants; |
243 |
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int flag; |
244 |
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int last_dc; |
245 |
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int i, ret; |
246 |
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247 |
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if (ctx->interlaced) |
248 |
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flag = get_bits1(gb); |
249 |
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else |
250 |
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flag = 0; |
251 |
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252 |
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quants = hqx_quants[get_bits(gb, 4)]; |
253 |
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254 |
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for (i = 0; i < 12; i++) { |
255 |
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int vlc_index = ctx->dcb - 9; |
256 |
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if (i == 0 || i == 4 || i == 8) |
257 |
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last_dc = 0; |
258 |
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ret = decode_block(gb, &ctx->dc_vlc[vlc_index], quants, |
259 |
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ctx->dcb, slice->block[i], &last_dc); |
260 |
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if (ret < 0) |
261 |
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return ret; |
262 |
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} |
263 |
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264 |
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put_blocks(ctx, 0, x, y, flag, slice->block[0], slice->block[ 2], hqx_quant_luma); |
265 |
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put_blocks(ctx, 0, x + 8, y, flag, slice->block[1], slice->block[ 3], hqx_quant_luma); |
266 |
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put_blocks(ctx, 2, x, y, flag, slice->block[4], slice->block[ 6], hqx_quant_chroma); |
267 |
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put_blocks(ctx, 2, x + 8, y, flag, slice->block[5], slice->block[ 7], hqx_quant_chroma); |
268 |
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put_blocks(ctx, 1, x, y, flag, slice->block[8], slice->block[10], hqx_quant_chroma); |
269 |
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put_blocks(ctx, 1, x + 8, y, flag, slice->block[9], slice->block[11], hqx_quant_chroma); |
270 |
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271 |
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return 0; |
272 |
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} |
273 |
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|
274 |
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static int hqx_decode_444a(HQXContext *ctx, int slice_no, int x, int y) |
275 |
|
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{ |
276 |
|
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HQXSlice *slice = &ctx->slice[slice_no]; |
277 |
|
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GetBitContext *gb = &slice->gb; |
278 |
|
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const int *quants; |
279 |
|
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int flag = 0; |
280 |
|
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int last_dc; |
281 |
|
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int i, ret; |
282 |
|
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int cbp; |
283 |
|
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|
284 |
|
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cbp = get_vlc2(gb, ctx->cbp_vlc.table, HQX_CBP_VLC_BITS, 1); |
285 |
|
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|
286 |
|
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for (i = 0; i < 16; i++) |
287 |
|
|
memset(slice->block[i], 0, sizeof(**slice->block) * 64); |
288 |
|
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for (i = 0; i < 16; i++) |
289 |
|
|
slice->block[i][0] = -0x800; |
290 |
|
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if (cbp) { |
291 |
|
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if (ctx->interlaced) |
292 |
|
|
flag = get_bits1(gb); |
293 |
|
|
|
294 |
|
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quants = hqx_quants[get_bits(gb, 4)]; |
295 |
|
|
|
296 |
|
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cbp |= cbp << 4; // alpha CBP |
297 |
|
|
cbp |= cbp << 8; // chroma CBP |
298 |
|
|
for (i = 0; i < 16; i++) { |
299 |
|
|
if (i == 0 || i == 4 || i == 8 || i == 12) |
300 |
|
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last_dc = 0; |
301 |
|
|
if (cbp & (1 << i)) { |
302 |
|
|
int vlc_index = ctx->dcb - 9; |
303 |
|
|
ret = decode_block(gb, &ctx->dc_vlc[vlc_index], quants, |
304 |
|
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ctx->dcb, slice->block[i], &last_dc); |
305 |
|
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if (ret < 0) |
306 |
|
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return ret; |
307 |
|
|
} |
308 |
|
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} |
309 |
|
|
} |
310 |
|
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|
311 |
|
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put_blocks(ctx, 3, x, y, flag, slice->block[ 0], slice->block[ 2], hqx_quant_luma); |
312 |
|
|
put_blocks(ctx, 3, x + 8, y, flag, slice->block[ 1], slice->block[ 3], hqx_quant_luma); |
313 |
|
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put_blocks(ctx, 0, x, y, flag, slice->block[ 4], slice->block[ 6], hqx_quant_luma); |
314 |
|
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put_blocks(ctx, 0, x + 8, y, flag, slice->block[ 5], slice->block[ 7], hqx_quant_luma); |
315 |
|
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put_blocks(ctx, 2, x, y, flag, slice->block[ 8], slice->block[10], hqx_quant_chroma); |
316 |
|
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put_blocks(ctx, 2, x + 8, y, flag, slice->block[ 9], slice->block[11], hqx_quant_chroma); |
317 |
|
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put_blocks(ctx, 1, x, y, flag, slice->block[12], slice->block[14], hqx_quant_chroma); |
318 |
|
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put_blocks(ctx, 1, x + 8, y, flag, slice->block[13], slice->block[15], hqx_quant_chroma); |
319 |
|
|
|
320 |
|
|
return 0; |
321 |
|
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} |
322 |
|
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|
323 |
|
|
static const int shuffle_16[16] = { |
324 |
|
|
0, 5, 11, 14, 2, 7, 9, 13, 1, 4, 10, 15, 3, 6, 8, 12 |
325 |
|
|
}; |
326 |
|
|
|
327 |
|
64 |
static int decode_slice(HQXContext *ctx, int slice_no) |
328 |
|
|
{ |
329 |
|
64 |
int mb_w = (ctx->width + 15) >> 4; |
330 |
|
64 |
int mb_h = (ctx->height + 15) >> 4; |
331 |
|
64 |
int grp_w = (mb_w + 4) / 5; |
332 |
|
64 |
int grp_h = (mb_h + 4) / 5; |
333 |
|
64 |
int grp_h_edge = grp_w * (mb_w / grp_w); |
334 |
|
64 |
int grp_v_edge = grp_h * (mb_h / grp_h); |
335 |
|
64 |
int grp_v_rest = mb_w - grp_h_edge; |
336 |
|
64 |
int grp_h_rest = mb_h - grp_v_edge; |
337 |
|
64 |
int num_mbs = mb_w * mb_h; |
338 |
|
64 |
int num_tiles = (num_mbs + 479) / 480; |
339 |
|
64 |
int std_tile_blocks = num_mbs / (16 * num_tiles); |
340 |
|
64 |
int g_tile = slice_no * num_tiles; |
341 |
|
|
int blk_addr, loc_addr, mb_x, mb_y, pos, loc_row, i; |
342 |
|
|
int tile_blocks, tile_limit, tile_no; |
343 |
|
|
|
344 |
✓✓ |
736 |
for (tile_no = 0; tile_no < num_tiles; tile_no++, g_tile++) { |
345 |
|
672 |
tile_blocks = std_tile_blocks; |
346 |
|
672 |
tile_limit = -1; |
347 |
✓✓ |
672 |
if (g_tile < num_mbs - std_tile_blocks * 16 * num_tiles) { |
348 |
|
40 |
tile_limit = num_mbs / (16 * num_tiles); |
349 |
|
40 |
tile_blocks++; |
350 |
|
|
} |
351 |
✓✓ |
20232 |
for (i = 0; i < tile_blocks; i++) { |
352 |
✓✓ |
19560 |
if (i == tile_limit) |
353 |
|
40 |
blk_addr = g_tile + 16 * num_tiles * i; |
354 |
|
|
else |
355 |
|
19520 |
blk_addr = tile_no + 16 * num_tiles * i + |
356 |
|
19520 |
num_tiles * shuffle_16[(i + slice_no) & 0xF]; |
357 |
|
19560 |
loc_row = grp_h * (blk_addr / (grp_h * mb_w)); |
358 |
|
19560 |
loc_addr = blk_addr % (grp_h * mb_w); |
359 |
✓✓ |
19560 |
if (loc_row >= grp_v_edge) { |
360 |
|
3240 |
mb_x = grp_w * (loc_addr / (grp_h_rest * grp_w)); |
361 |
|
3240 |
pos = loc_addr % (grp_h_rest * grp_w); |
362 |
|
|
} else { |
363 |
|
16320 |
mb_x = grp_w * (loc_addr / (grp_h * grp_w)); |
364 |
|
16320 |
pos = loc_addr % (grp_h * grp_w); |
365 |
|
|
} |
366 |
✗✓ |
19560 |
if (mb_x >= grp_h_edge) { |
367 |
|
|
mb_x += pos % grp_v_rest; |
368 |
|
|
mb_y = loc_row + (pos / grp_v_rest); |
369 |
|
|
} else { |
370 |
|
19560 |
mb_x += pos % grp_w; |
371 |
|
19560 |
mb_y = loc_row + (pos / grp_w); |
372 |
|
|
} |
373 |
|
19560 |
ctx->decode_func(ctx, slice_no, mb_x * 16, mb_y * 16); |
374 |
|
|
} |
375 |
|
|
} |
376 |
|
|
|
377 |
|
64 |
return 0; |
378 |
|
|
} |
379 |
|
|
|
380 |
|
64 |
static int decode_slice_thread(AVCodecContext *avctx, void *arg, |
381 |
|
|
int slice_no, int threadnr) |
382 |
|
|
{ |
383 |
|
64 |
HQXContext *ctx = avctx->priv_data; |
384 |
|
64 |
uint32_t *slice_off = ctx->slice_off; |
385 |
|
|
int ret; |
386 |
|
|
|
387 |
✓✗ |
64 |
if (slice_off[slice_no] < HQX_HEADER_SIZE || |
388 |
✓✗ |
64 |
slice_off[slice_no] >= slice_off[slice_no + 1] || |
389 |
✗✓ |
64 |
slice_off[slice_no + 1] > ctx->data_size) { |
390 |
|
|
av_log(avctx, AV_LOG_ERROR, "Invalid slice size %d.\n", ctx->data_size); |
391 |
|
|
return AVERROR_INVALIDDATA; |
392 |
|
|
} |
393 |
|
|
|
394 |
|
64 |
ret = init_get_bits8(&ctx->slice[slice_no].gb, |
395 |
|
64 |
ctx->src + slice_off[slice_no], |
396 |
|
64 |
slice_off[slice_no + 1] - slice_off[slice_no]); |
397 |
✗✓ |
64 |
if (ret < 0) |
398 |
|
|
return ret; |
399 |
|
|
|
400 |
|
64 |
return decode_slice(ctx, slice_no); |
401 |
|
|
} |
402 |
|
|
|
403 |
|
4 |
static int hqx_decode_frame(AVCodecContext *avctx, void *data, |
404 |
|
|
int *got_picture_ptr, AVPacket *avpkt) |
405 |
|
|
{ |
406 |
|
4 |
HQXContext *ctx = avctx->priv_data; |
407 |
|
4 |
ThreadFrame frame = { .f = data }; |
408 |
|
4 |
uint8_t *src = avpkt->data; |
409 |
|
|
uint32_t info_tag; |
410 |
|
|
int data_start; |
411 |
|
|
int i, ret; |
412 |
|
|
|
413 |
✗✓ |
4 |
if (avpkt->size < 4 + 4) { |
414 |
|
|
av_log(avctx, AV_LOG_ERROR, "Frame is too small %d.\n", avpkt->size); |
415 |
|
|
return AVERROR_INVALIDDATA; |
416 |
|
|
} |
417 |
|
|
|
418 |
|
4 |
info_tag = AV_RL32(src); |
419 |
✓✗ |
4 |
if (info_tag == MKTAG('I', 'N', 'F', 'O')) { |
420 |
|
4 |
uint32_t info_offset = AV_RL32(src + 4); |
421 |
✓✗✗✓
|
4 |
if (info_offset > INT_MAX || info_offset + 8 > avpkt->size) { |
422 |
|
|
av_log(avctx, AV_LOG_ERROR, |
423 |
|
|
"Invalid INFO header offset: 0x%08"PRIX32" is too large.\n", |
424 |
|
|
info_offset); |
425 |
|
|
return AVERROR_INVALIDDATA; |
426 |
|
|
} |
427 |
|
4 |
ff_canopus_parse_info_tag(avctx, src + 8, info_offset); |
428 |
|
|
|
429 |
|
4 |
info_offset += 8; |
430 |
|
4 |
src += info_offset; |
431 |
|
|
} |
432 |
|
|
|
433 |
|
4 |
data_start = src - avpkt->data; |
434 |
|
4 |
ctx->data_size = avpkt->size - data_start; |
435 |
|
4 |
ctx->src = src; |
436 |
|
4 |
ctx->pic = data; |
437 |
|
|
|
438 |
✗✓ |
4 |
if (ctx->data_size < HQX_HEADER_SIZE) { |
439 |
|
|
av_log(avctx, AV_LOG_ERROR, "Frame too small.\n"); |
440 |
|
|
return AVERROR_INVALIDDATA; |
441 |
|
|
} |
442 |
|
|
|
443 |
✓✗✗✓
|
4 |
if (src[0] != 'H' || src[1] != 'Q') { |
444 |
|
|
av_log(avctx, AV_LOG_ERROR, "Not an HQX frame.\n"); |
445 |
|
|
return AVERROR_INVALIDDATA; |
446 |
|
|
} |
447 |
|
4 |
ctx->interlaced = !(src[2] & 0x80); |
448 |
|
4 |
ctx->format = src[2] & 7; |
449 |
|
4 |
ctx->dcb = (src[3] & 3) + 8; |
450 |
|
4 |
ctx->width = AV_RB16(src + 4); |
451 |
|
4 |
ctx->height = AV_RB16(src + 6); |
452 |
✓✓ |
72 |
for (i = 0; i < 17; i++) |
453 |
|
68 |
ctx->slice_off[i] = AV_RB24(src + 8 + i * 3); |
454 |
|
|
|
455 |
✗✓ |
4 |
if (ctx->dcb == 8) { |
456 |
|
|
av_log(avctx, AV_LOG_ERROR, "Invalid DC precision %d.\n", ctx->dcb); |
457 |
|
|
return AVERROR_INVALIDDATA; |
458 |
|
|
} |
459 |
|
4 |
ret = av_image_check_size(ctx->width, ctx->height, 0, avctx); |
460 |
✗✓ |
4 |
if (ret < 0) { |
461 |
|
|
av_log(avctx, AV_LOG_ERROR, "Invalid stored dimensions %dx%d.\n", |
462 |
|
|
ctx->width, ctx->height); |
463 |
|
|
return AVERROR_INVALIDDATA; |
464 |
|
|
} |
465 |
|
|
|
466 |
|
4 |
avctx->coded_width = FFALIGN(ctx->width, 16); |
467 |
|
4 |
avctx->coded_height = FFALIGN(ctx->height, 16); |
468 |
|
4 |
avctx->width = ctx->width; |
469 |
|
4 |
avctx->height = ctx->height; |
470 |
|
4 |
avctx->bits_per_raw_sample = 10; |
471 |
|
|
|
472 |
|
|
//The minimum size is 2bit per macroblock |
473 |
|
|
// hqx_decode_422 & hqx_decode_444 have a unconditionally stored 4bits hqx_quants index |
474 |
|
|
// hqx_decode_422a & hqx_decode_444a use cbp_vlc which has a minimum length of 2 bits for its VLCs |
475 |
|
|
// The code rejects slices overlapping in their input data |
476 |
|
4 |
if (avctx->coded_width / 16 * (avctx->coded_height / 16) * |
477 |
✗✓ |
4 |
(100 - avctx->discard_damaged_percentage) / 100 > 4LL * avpkt->size) |
478 |
|
|
return AVERROR_INVALIDDATA; |
479 |
|
|
|
480 |
✓✗✓✗ ✗ |
4 |
switch (ctx->format) { |
481 |
|
2 |
case HQX_422: |
482 |
|
2 |
avctx->pix_fmt = AV_PIX_FMT_YUV422P16; |
483 |
|
2 |
ctx->decode_func = hqx_decode_422; |
484 |
|
2 |
break; |
485 |
|
|
case HQX_444: |
486 |
|
|
avctx->pix_fmt = AV_PIX_FMT_YUV444P16; |
487 |
|
|
ctx->decode_func = hqx_decode_444; |
488 |
|
|
break; |
489 |
|
2 |
case HQX_422A: |
490 |
|
2 |
avctx->pix_fmt = AV_PIX_FMT_YUVA422P16; |
491 |
|
2 |
ctx->decode_func = hqx_decode_422a; |
492 |
|
2 |
break; |
493 |
|
|
case HQX_444A: |
494 |
|
|
avctx->pix_fmt = AV_PIX_FMT_YUVA444P16; |
495 |
|
|
ctx->decode_func = hqx_decode_444a; |
496 |
|
|
break; |
497 |
|
|
default: |
498 |
|
|
av_log(avctx, AV_LOG_ERROR, "Invalid format: %d.\n", ctx->format); |
499 |
|
|
return AVERROR_INVALIDDATA; |
500 |
|
|
} |
501 |
|
|
|
502 |
|
4 |
ret = ff_thread_get_buffer(avctx, &frame, 0); |
503 |
✗✓ |
4 |
if (ret < 0) |
504 |
|
|
return ret; |
505 |
|
|
|
506 |
|
4 |
avctx->execute2(avctx, decode_slice_thread, NULL, NULL, 16); |
507 |
|
|
|
508 |
|
4 |
ctx->pic->key_frame = 1; |
509 |
|
4 |
ctx->pic->pict_type = AV_PICTURE_TYPE_I; |
510 |
|
|
|
511 |
|
4 |
*got_picture_ptr = 1; |
512 |
|
|
|
513 |
|
4 |
return avpkt->size; |
514 |
|
|
} |
515 |
|
|
|
516 |
|
4 |
static av_cold int hqx_decode_close(AVCodecContext *avctx) |
517 |
|
|
{ |
518 |
|
|
int i; |
519 |
|
4 |
HQXContext *ctx = avctx->priv_data; |
520 |
|
|
|
521 |
|
4 |
ff_free_vlc(&ctx->cbp_vlc); |
522 |
✓✓ |
16 |
for (i = 0; i < 3; i++) { |
523 |
|
12 |
ff_free_vlc(&ctx->dc_vlc[i]); |
524 |
|
|
} |
525 |
|
|
|
526 |
|
4 |
return 0; |
527 |
|
|
} |
528 |
|
|
|
529 |
|
4 |
static av_cold int hqx_decode_init(AVCodecContext *avctx) |
530 |
|
|
{ |
531 |
|
4 |
HQXContext *ctx = avctx->priv_data; |
532 |
|
|
|
533 |
|
4 |
ff_hqxdsp_init(&ctx->hqxdsp); |
534 |
|
|
|
535 |
|
4 |
return ff_hqx_init_vlcs(ctx); |
536 |
|
|
} |
537 |
|
|
|
538 |
|
|
AVCodec ff_hqx_decoder = { |
539 |
|
|
.name = "hqx", |
540 |
|
|
.long_name = NULL_IF_CONFIG_SMALL("Canopus HQX"), |
541 |
|
|
.type = AVMEDIA_TYPE_VIDEO, |
542 |
|
|
.id = AV_CODEC_ID_HQX, |
543 |
|
|
.priv_data_size = sizeof(HQXContext), |
544 |
|
|
.init = hqx_decode_init, |
545 |
|
|
.decode = hqx_decode_frame, |
546 |
|
|
.close = hqx_decode_close, |
547 |
|
|
.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_SLICE_THREADS | |
548 |
|
|
AV_CODEC_CAP_FRAME_THREADS, |
549 |
|
|
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | |
550 |
|
|
FF_CODEC_CAP_INIT_CLEANUP, |
551 |
|
|
}; |