| /* |
| * Canopus HQX decoder |
| * |
| * 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 <inttypes.h> |
| |
| #include "libavutil/imgutils.h" |
| #include "libavutil/intreadwrite.h" |
| |
| #include "avcodec.h" |
| #include "get_bits.h" |
| #include "internal.h" |
| |
| #include "hqx.h" |
| |
| /* HQX has four modes - 422, 444, 422alpha and 444alpha - all 12-bit */ |
| enum HQXFormat { |
| HQX_422 = 0, |
| HQX_444, |
| HQX_422A, |
| HQX_444A, |
| }; |
| |
| #define HQX_HEADER_SIZE 59 |
| |
| typedef int (*mb_decode_func)(HQXContext *ctx, AVFrame *pic, |
| GetBitContext *gb, int x, int y); |
| |
| /* macroblock selects a group of 4 possible quants and |
| * a block can use any of those four quantisers |
| * one column is powers of 2, the other one is powers of 2 * 3, |
| * then there is the special one, powers of 2 * 5 */ |
| static const int hqx_quants[16][4] = { |
| { 0x1, 0x2, 0x4, 0x8 }, { 0x1, 0x3, 0x6, 0xC }, |
| { 0x2, 0x4, 0x8, 0x10 }, { 0x3, 0x6, 0xC, 0x18 }, |
| { 0x4, 0x8, 0x10, 0x20 }, { 0x6, 0xC, 0x18, 0x30 }, |
| { 0x8, 0x10, 0x20, 0x40 }, |
| { 0xA, 0x14, 0x28, 0x50 }, |
| { 0xC, 0x18, 0x30, 0x60 }, |
| { 0x10, 0x20, 0x40, 0x80 }, { 0x18, 0x30, 0x60, 0xC0 }, |
| { 0x20, 0x40, 0x80, 0x100 }, { 0x30, 0x60, 0xC0, 0x180 }, |
| { 0x40, 0x80, 0x100, 0x200 }, { 0x60, 0xC0, 0x180, 0x300 }, |
| { 0x80, 0x100, 0x200, 0x400 } |
| }; |
| |
| static const uint8_t hqx_quant_luma[64] = { |
| 16, 16, 16, 19, 19, 19, 42, 44, |
| 16, 16, 19, 19, 19, 38, 43, 45, |
| 16, 19, 19, 19, 40, 41, 45, 48, |
| 19, 19, 19, 40, 41, 42, 46, 49, |
| 19, 19, 40, 41, 42, 43, 48, 101, |
| 19, 38, 41, 42, 43, 44, 98, 104, |
| 42, 43, 45, 46, 48, 98, 109, 116, |
| 44, 45, 48, 49, 101, 104, 116, 123, |
| }; |
| |
| static const uint8_t hqx_quant_chroma[64] = { |
| 16, 16, 19, 25, 26, 26, 42, 44, |
| 16, 19, 25, 25, 26, 38, 43, 91, |
| 19, 25, 26, 27, 40, 41, 91, 96, |
| 25, 25, 27, 40, 41, 84, 93, 197, |
| 26, 26, 40, 41, 84, 86, 191, 203, |
| 26, 38, 41, 84, 86, 177, 197, 209, |
| 42, 43, 91, 93, 191, 197, 219, 232, |
| 44, 91, 96, 197, 203, 209, 232, 246, |
| }; |
| |
| static inline void idct_col(int16_t *blk, const uint8_t *quant) |
| { |
| int t0, t1, t2, t3, t4, t5, t6, t7, t8, t9, tA, tB, tC, tD, tE, tF; |
| int t10, t11, t12, t13; |
| int s0, s1, s2, s3, s4, s5, s6, s7; |
| |
| s0 = (int) blk[0 * 8] * quant[0 * 8]; |
| s1 = (int) blk[1 * 8] * quant[1 * 8]; |
| s2 = (int) blk[2 * 8] * quant[2 * 8]; |
| s3 = (int) blk[3 * 8] * quant[3 * 8]; |
| s4 = (int) blk[4 * 8] * quant[4 * 8]; |
| s5 = (int) blk[5 * 8] * quant[5 * 8]; |
| s6 = (int) blk[6 * 8] * quant[6 * 8]; |
| s7 = (int) blk[7 * 8] * quant[7 * 8]; |
| |
| t0 = (s3 * 19266 + s5 * 12873) >> 15; |
| t1 = (s5 * 19266 - s3 * 12873) >> 15; |
| t2 = ((s7 * 4520 + s1 * 22725) >> 15) - t0; |
| t3 = ((s1 * 4520 - s7 * 22725) >> 15) - t1; |
| t4 = t0 * 2 + t2; |
| t5 = t1 * 2 + t3; |
| t6 = t2 - t3; |
| t7 = t3 * 2 + t6; |
| t8 = (t6 * 11585) >> 14; |
| t9 = (t7 * 11585) >> 14; |
| tA = (s2 * 8867 - s6 * 21407) >> 14; |
| tB = (s6 * 8867 + s2 * 21407) >> 14; |
| tC = (s0 >> 1) - (s4 >> 1); |
| tD = (s4 >> 1) * 2 + tC; |
| tE = tC - (tA >> 1); |
| tF = tD - (tB >> 1); |
| t10 = tF - t5; |
| t11 = tE - t8; |
| t12 = tE + (tA >> 1) * 2 - t9; |
| t13 = tF + (tB >> 1) * 2 - t4; |
| |
| blk[0 * 8] = t13 + t4 * 2; |
| blk[1 * 8] = t12 + t9 * 2; |
| blk[2 * 8] = t11 + t8 * 2; |
| blk[3 * 8] = t10 + t5 * 2; |
| blk[4 * 8] = t10; |
| blk[5 * 8] = t11; |
| blk[6 * 8] = t12; |
| blk[7 * 8] = t13; |
| } |
| |
| static inline void idct_row(int16_t *blk) |
| { |
| int t0, t1, t2, t3, t4, t5, t6, t7, t8, t9, tA, tB, tC, tD, tE, tF; |
| int t10, t11, t12, t13; |
| |
| t0 = (blk[3] * 19266 + blk[5] * 12873) >> 14; |
| t1 = (blk[5] * 19266 - blk[3] * 12873) >> 14; |
| t2 = ((blk[7] * 4520 + blk[1] * 22725) >> 14) - t0; |
| t3 = ((blk[1] * 4520 - blk[7] * 22725) >> 14) - t1; |
| t4 = t0 * 2 + t2; |
| t5 = t1 * 2 + t3; |
| t6 = t2 - t3; |
| t7 = t3 * 2 + t6; |
| t8 = (t6 * 11585) >> 14; |
| t9 = (t7 * 11585) >> 14; |
| tA = (blk[2] * 8867 - blk[6] * 21407) >> 14; |
| tB = (blk[6] * 8867 + blk[2] * 21407) >> 14; |
| tC = blk[0] - blk[4]; |
| tD = blk[4] * 2 + tC; |
| tE = tC - tA; |
| tF = tD - tB; |
| t10 = tF - t5; |
| t11 = tE - t8; |
| t12 = tE + tA * 2 - t9; |
| t13 = tF + tB * 2 - t4; |
| |
| blk[0] = (t13 + t4 * 2 + 4) >> 3; |
| blk[1] = (t12 + t9 * 2 + 4) >> 3; |
| blk[2] = (t11 + t8 * 2 + 4) >> 3; |
| blk[3] = (t10 + t5 * 2 + 4) >> 3; |
| blk[4] = (t10 + 4) >> 3; |
| blk[5] = (t11 + 4) >> 3; |
| blk[6] = (t12 + 4) >> 3; |
| blk[7] = (t13 + 4) >> 3; |
| } |
| |
| static void hqx_idct(int16_t *block, const uint8_t *quant) |
| { |
| int i; |
| |
| for (i = 0; i < 8; i++) |
| idct_col(block + i, quant + i); |
| for (i = 0; i < 8; i++) |
| idct_row(block + i * 8); |
| } |
| |
| static void hqx_idct_put(uint16_t *dst, ptrdiff_t stride, |
| int16_t *block, const uint8_t *quant) |
| { |
| int i, j; |
| |
| hqx_idct(block, quant); |
| |
| for (i = 0; i < 8; i++) { |
| for (j = 0; j < 8; j++) { |
| int v = av_clip(block[j + i * 8] + 0x800, 0, 0x1000); |
| dst[j] = (v << 4) | (v >> 8); |
| } |
| dst += stride >> 1; |
| } |
| } |
| |
| static inline void put_blocks(AVFrame *pic, int plane, |
| int x, int y, int ilace, |
| int16_t *block0, int16_t *block1, |
| const uint8_t *quant) |
| { |
| int fields = ilace ? 2 : 1; |
| int lsize = pic->linesize[plane]; |
| uint8_t *p = pic->data[plane] + x * 2; |
| |
| hqx_idct_put((uint16_t *)(p + y * lsize), lsize * fields, block0, quant); |
| hqx_idct_put((uint16_t *)(p + (y + (ilace ? 1 : 8)) * lsize), |
| lsize * fields, block1, quant); |
| } |
| |
| static inline void hqx_get_ac(GetBitContext *gb, const HQXAC *ac, |
| int *run, int *lev) |
| { |
| int val; |
| |
| val = show_bits(gb, ac->lut_bits); |
| if (ac->lut[val].bits == -1) { |
| GetBitContext gb2 = *gb; |
| skip_bits(&gb2, ac->lut_bits); |
| val = ac->lut[val].lev + show_bits(&gb2, ac->extra_bits); |
| } |
| *run = ac->lut[val].run; |
| *lev = ac->lut[val].lev; |
| skip_bits(gb, ac->lut[val].bits); |
| } |
| |
| static int decode_block(GetBitContext *gb, VLC *vlc, |
| const int *quants, int dcb, |
| int16_t block[64], int *last_dc) |
| { |
| int q, dc; |
| int ac_idx; |
| int run, lev, pos = 1; |
| |
| memset(block, 0, 64 * sizeof(*block)); |
| dc = get_vlc2(gb, vlc->table, HQX_DC_VLC_BITS, 2); |
| if (dc < 0) |
| return AVERROR_INVALIDDATA; |
| *last_dc += dc; |
| |
| block[0] = sign_extend(*last_dc << (12 - dcb), 12); |
| |
| q = quants[get_bits(gb, 2)]; |
| if (q >= 128) |
| ac_idx = HQX_AC_Q128; |
| else if (q >= 64) |
| ac_idx = HQX_AC_Q64; |
| else if (q >= 32) |
| ac_idx = HQX_AC_Q32; |
| else if (q >= 16) |
| ac_idx = HQX_AC_Q16; |
| else if (q >= 8) |
| ac_idx = HQX_AC_Q8; |
| else |
| ac_idx = HQX_AC_Q0; |
| |
| do { |
| hqx_get_ac(gb, &ff_hqx_ac[ac_idx], &run, &lev); |
| pos += run; |
| if (pos >= 64) |
| break; |
| block[ff_zigzag_direct[pos++]] = lev * q; |
| } while (pos < 64); |
| |
| return 0; |
| } |
| |
| static int hqx_decode_422(HQXContext *ctx, AVFrame *pic, |
| GetBitContext *gb, int x, int y) |
| { |
| const int *quants; |
| int flag; |
| int last_dc; |
| int i, ret; |
| |
| if (ctx->interlaced) |
| flag = get_bits1(gb); |
| else |
| flag = 0; |
| |
| quants = hqx_quants[get_bits(gb, 4)]; |
| |
| for (i = 0; i < 8; i++) { |
| int vlc_index = ctx->dcb - 9; |
| if (i == 0 || i == 4 || i == 6) |
| last_dc = 0; |
| ret = decode_block(gb, &ctx->dc_vlc[vlc_index], quants, |
| ctx->dcb, ctx->block[i], &last_dc); |
| if (ret < 0) |
| return ret; |
| } |
| |
| put_blocks(pic, 0, x, y, flag, ctx->block[0], ctx->block[2], hqx_quant_luma); |
| put_blocks(pic, 0, x + 8, y, flag, ctx->block[1], ctx->block[3], hqx_quant_luma); |
| put_blocks(pic, 2, x >> 1, y, flag, ctx->block[4], ctx->block[5], hqx_quant_chroma); |
| put_blocks(pic, 1, x >> 1, y, flag, ctx->block[6], ctx->block[7], hqx_quant_chroma); |
| |
| return 0; |
| } |
| |
| static int hqx_decode_422a(HQXContext *ctx, AVFrame *pic, |
| GetBitContext *gb, int x, int y) |
| { |
| const int *quants; |
| int flag = 0; |
| int last_dc; |
| int i, ret; |
| int cbp; |
| |
| cbp = get_vlc2(gb, ctx->cbp_vlc.table, ctx->cbp_vlc.bits, 1); |
| |
| for (i = 0; i < 12; i++) |
| memset(ctx->block[i], 0, sizeof(**ctx->block) * 64); |
| for (i = 0; i < 12; i++) |
| ctx->block[i][0] = -0x800; |
| if (cbp) { |
| if (ctx->interlaced) |
| flag = get_bits1(gb); |
| |
| quants = hqx_quants[get_bits(gb, 4)]; |
| |
| cbp |= cbp << 4; // alpha CBP |
| if (cbp & 0x3) // chroma CBP - top |
| cbp |= 0x500; |
| if (cbp & 0xC) // chroma CBP - bottom |
| cbp |= 0xA00; |
| for (i = 0; i < 12; i++) { |
| if (i == 0 || i == 4 || i == 8 || i == 10) |
| last_dc = 0; |
| if (cbp & (1 << i)) { |
| int vlc_index = ctx->dcb - 9; |
| ret = decode_block(gb, &ctx->dc_vlc[vlc_index], quants, |
| ctx->dcb, ctx->block[i], &last_dc); |
| if (ret < 0) |
| return ret; |
| } |
| } |
| } |
| |
| put_blocks(pic, 3, x, y, flag, ctx->block[ 0], ctx->block[ 2], hqx_quant_luma); |
| put_blocks(pic, 3, x + 8, y, flag, ctx->block[ 1], ctx->block[ 3], hqx_quant_luma); |
| put_blocks(pic, 0, x, y, flag, ctx->block[ 4], ctx->block[ 6], hqx_quant_luma); |
| put_blocks(pic, 0, x + 8, y, flag, ctx->block[ 5], ctx->block[ 7], hqx_quant_luma); |
| put_blocks(pic, 2, x >> 1, y, flag, ctx->block[ 8], ctx->block[ 9], hqx_quant_chroma); |
| put_blocks(pic, 1, x >> 1, y, flag, ctx->block[10], ctx->block[11], hqx_quant_chroma); |
| |
| return 0; |
| } |
| |
| static int hqx_decode_444(HQXContext *ctx, AVFrame *pic, |
| GetBitContext *gb, int x, int y) |
| { |
| const int *quants; |
| int flag; |
| int last_dc; |
| int i, ret; |
| |
| if (ctx->interlaced) |
| flag = get_bits1(gb); |
| else |
| flag = 0; |
| |
| quants = hqx_quants[get_bits(gb, 4)]; |
| |
| for (i = 0; i < 12; i++) { |
| int vlc_index = ctx->dcb - 9; |
| if (i == 0 || i == 4 || i == 8) |
| last_dc = 0; |
| ret = decode_block(gb, &ctx->dc_vlc[vlc_index], quants, |
| ctx->dcb, ctx->block[i], &last_dc); |
| if (ret < 0) |
| return ret; |
| } |
| |
| put_blocks(pic, 0, x, y, flag, ctx->block[0], ctx->block[ 2], hqx_quant_luma); |
| put_blocks(pic, 0, x + 8, y, flag, ctx->block[1], ctx->block[ 3], hqx_quant_luma); |
| put_blocks(pic, 2, x, y, flag, ctx->block[4], ctx->block[ 6], hqx_quant_chroma); |
| put_blocks(pic, 2, x + 8, y, flag, ctx->block[5], ctx->block[ 7], hqx_quant_chroma); |
| put_blocks(pic, 1, x, y, flag, ctx->block[8], ctx->block[10], hqx_quant_chroma); |
| put_blocks(pic, 1, x + 8, y, flag, ctx->block[9], ctx->block[11], hqx_quant_chroma); |
| |
| return 0; |
| } |
| |
| static int hqx_decode_444a(HQXContext *ctx, AVFrame *pic, |
| GetBitContext *gb, int x, int y) |
| { |
| const int *quants; |
| int flag = 0; |
| int last_dc; |
| int i, ret; |
| int cbp; |
| |
| cbp = get_vlc2(gb, ctx->cbp_vlc.table, ctx->cbp_vlc.bits, 1); |
| |
| for (i = 0; i < 16; i++) |
| memset(ctx->block[i], 0, sizeof(**ctx->block) * 64); |
| for (i = 0; i < 16; i++) |
| ctx->block[i][0] = -0x800; |
| if (cbp) { |
| if (ctx->interlaced) |
| flag = get_bits1(gb); |
| |
| quants = hqx_quants[get_bits(gb, 4)]; |
| |
| cbp |= cbp << 4; // alpha CBP |
| cbp |= cbp << 8; // chroma CBP |
| for (i = 0; i < 16; i++) { |
| if (i == 0 || i == 4 || i == 8 || i == 12) |
| last_dc = 0; |
| if (cbp & (1 << i)) { |
| int vlc_index = ctx->dcb - 9; |
| ret = decode_block(gb, &ctx->dc_vlc[vlc_index], quants, |
| ctx->dcb, ctx->block[i], &last_dc); |
| if (ret < 0) |
| return ret; |
| } |
| } |
| } |
| |
| put_blocks(pic, 3, x, y, flag, ctx->block[ 0], ctx->block[ 2], hqx_quant_luma); |
| put_blocks(pic, 3, x + 8, y, flag, ctx->block[ 1], ctx->block[ 3], hqx_quant_luma); |
| put_blocks(pic, 0, x, y, flag, ctx->block[ 4], ctx->block[ 6], hqx_quant_luma); |
| put_blocks(pic, 0, x + 8, y, flag, ctx->block[ 5], ctx->block[ 7], hqx_quant_luma); |
| put_blocks(pic, 2, x, y, flag, ctx->block[ 8], ctx->block[10], hqx_quant_chroma); |
| put_blocks(pic, 2, x + 8, y, flag, ctx->block[ 9], ctx->block[11], hqx_quant_chroma); |
| put_blocks(pic, 1, x, y, flag, ctx->block[12], ctx->block[14], hqx_quant_chroma); |
| put_blocks(pic, 1, x + 8, y, flag, ctx->block[13], ctx->block[15], hqx_quant_chroma); |
| |
| return 0; |
| } |
| |
| static const int shuffle_16[16] = { |
| 0, 5, 11, 14, 2, 7, 9, 13, 1, 4, 10, 15, 3, 6, 8, 12 |
| }; |
| |
| static int decode_slice(HQXContext *ctx, AVFrame *pic, GetBitContext *gb, |
| int slice_no, mb_decode_func decode_func) |
| { |
| int mb_w = (ctx->width + 15) >> 4; |
| int mb_h = (ctx->height + 15) >> 4; |
| int grp_w = (mb_w + 4) / 5; |
| int grp_h = (mb_h + 4) / 5; |
| int grp_h_edge = grp_w * (mb_w / grp_w); |
| int grp_v_edge = grp_h * (mb_h / grp_h); |
| int grp_v_rest = mb_w - grp_h_edge; |
| int grp_h_rest = mb_h - grp_v_edge; |
| int num_mbs = mb_w * mb_h; |
| int num_tiles = (num_mbs + 479) / 480; |
| int std_tile_blocks = num_mbs / (16 * num_tiles); |
| int g_tile = slice_no * num_tiles; |
| int blk_addr, loc_addr, mb_x, mb_y, pos, loc_row, i; |
| int tile_blocks, tile_limit, tile_no; |
| |
| for (tile_no = 0; tile_no < num_tiles; tile_no++, g_tile++) { |
| tile_blocks = std_tile_blocks; |
| tile_limit = -1; |
| if (g_tile < num_mbs - std_tile_blocks * 16 * num_tiles) { |
| tile_limit = num_mbs / (16 * num_tiles); |
| tile_blocks++; |
| } |
| for (i = 0; i < tile_blocks; i++) { |
| if (i == tile_limit) |
| blk_addr = g_tile + 16 * num_tiles * i; |
| else |
| blk_addr = tile_no + 16 * num_tiles * i + |
| num_tiles * shuffle_16[(i + slice_no) & 0xF]; |
| loc_row = grp_h * (blk_addr / (grp_h * mb_w)); |
| loc_addr = blk_addr % (grp_h * mb_w); |
| if (loc_row >= grp_v_edge) { |
| mb_x = grp_w * (loc_addr / (grp_h_rest * grp_w)); |
| pos = loc_addr % (grp_h_rest * grp_w); |
| } else { |
| mb_x = grp_w * (loc_addr / (grp_h * grp_w)); |
| pos = loc_addr % (grp_h * grp_w); |
| } |
| if (mb_x >= grp_h_edge) { |
| mb_x += pos % grp_v_rest; |
| mb_y = loc_row + (pos / grp_v_rest); |
| } else { |
| mb_x += pos % grp_w; |
| mb_y = loc_row + (pos / grp_w); |
| } |
| decode_func(ctx, pic, gb, mb_x * 16, mb_y * 16); |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int hqx_decode_frame(AVCodecContext *avctx, void *data, |
| int *got_picture_ptr, AVPacket *avpkt) |
| { |
| HQXContext *ctx = avctx->priv_data; |
| AVFrame *pic = data; |
| uint8_t *src = avpkt->data; |
| uint32_t info_tag, info_offset; |
| int data_start; |
| unsigned data_size; |
| GetBitContext gb; |
| int i, ret; |
| int slice; |
| uint32_t slice_off[17]; |
| mb_decode_func decode_func = 0; |
| |
| if (avpkt->size < 8) |
| return AVERROR_INVALIDDATA; |
| |
| /* Skip the INFO header if present */ |
| info_offset = 0; |
| info_tag = AV_RL32(src); |
| if (info_tag == MKTAG('I', 'N', 'F', 'O')) { |
| info_offset = AV_RL32(src + 4); |
| if (info_offset > UINT32_MAX - 8 || info_offset + 8 > avpkt->size) { |
| av_log(avctx, AV_LOG_ERROR, |
| "Invalid INFO header offset: 0x%08"PRIX32" is too large.\n", |
| info_offset); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| info_offset += 8; |
| src += info_offset; |
| |
| av_log(avctx, AV_LOG_DEBUG, "Skipping INFO chunk.\n"); |
| } |
| |
| data_start = src - avpkt->data; |
| data_size = avpkt->size - data_start; |
| |
| if (data_size < HQX_HEADER_SIZE) { |
| av_log(avctx, AV_LOG_ERROR, "Frame too small.\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if (src[0] != 'H' || src[1] != 'Q') { |
| av_log(avctx, AV_LOG_ERROR, "Not an HQX frame.\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| ctx->interlaced = !(src[2] & 0x80); |
| ctx->format = src[2] & 7; |
| ctx->dcb = (src[3] & 3) + 8; |
| ctx->width = AV_RB16(src + 4); |
| ctx->height = AV_RB16(src + 6); |
| for (i = 0; i < 17; i++) |
| slice_off[i] = AV_RB24(src + 8 + i * 3); |
| |
| if (ctx->dcb == 8) { |
| av_log(avctx, AV_LOG_ERROR, "Invalid DC precision %d.\n", ctx->dcb); |
| return AVERROR_INVALIDDATA; |
| } |
| ret = av_image_check_size(ctx->width, ctx->height, 0, avctx); |
| if (ret < 0) { |
| av_log(avctx, AV_LOG_ERROR, "Invalid stored dimensions %dx%d.\n", |
| ctx->width, ctx->height); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| avctx->coded_width = FFALIGN(ctx->width, 16); |
| avctx->coded_height = FFALIGN(ctx->height, 16); |
| avctx->width = ctx->width; |
| avctx->height = ctx->height; |
| avctx->bits_per_raw_sample = 10; |
| |
| switch (ctx->format) { |
| case HQX_422: |
| avctx->pix_fmt = AV_PIX_FMT_YUV422P16; |
| decode_func = hqx_decode_422; |
| break; |
| case HQX_444: |
| avctx->pix_fmt = AV_PIX_FMT_YUV444P16; |
| decode_func = hqx_decode_444; |
| break; |
| case HQX_422A: |
| avctx->pix_fmt = AV_PIX_FMT_YUVA422P16; |
| decode_func = hqx_decode_422a; |
| break; |
| case HQX_444A: |
| avctx->pix_fmt = AV_PIX_FMT_YUVA444P16; |
| decode_func = hqx_decode_444a; |
| break; |
| } |
| if (!decode_func) { |
| av_log(avctx, AV_LOG_ERROR, "Invalid format: %d.\n", ctx->format); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| ret = ff_get_buffer(avctx, pic, 0); |
| if (ret < 0) |
| return ret; |
| |
| for (slice = 0; slice < 16; slice++) { |
| if (slice_off[slice] < HQX_HEADER_SIZE || |
| slice_off[slice] >= slice_off[slice + 1] || |
| slice_off[slice + 1] > data_size) { |
| av_log(avctx, AV_LOG_ERROR, "Invalid slice size.\n"); |
| break; |
| } |
| ret = init_get_bits8(&gb, src + slice_off[slice], |
| slice_off[slice + 1] - slice_off[slice]); |
| if (ret < 0) |
| return ret; |
| ret = decode_slice(ctx, pic, &gb, slice, decode_func); |
| if (ret < 0) { |
| av_log(avctx, AV_LOG_ERROR, "Error decoding slice %d.\n", slice); |
| } |
| } |
| |
| pic->key_frame = 1; |
| pic->pict_type = AV_PICTURE_TYPE_I; |
| |
| *got_picture_ptr = 1; |
| |
| return avpkt->size; |
| } |
| |
| static av_cold int hqx_decode_close(AVCodecContext *avctx) |
| { |
| int i; |
| HQXContext *ctx = avctx->priv_data; |
| |
| ff_free_vlc(&ctx->cbp_vlc); |
| for (i = 0; i < 3; i++) { |
| ff_free_vlc(&ctx->dc_vlc[i]); |
| } |
| |
| return 0; |
| } |
| |
| static av_cold int hqx_decode_init(AVCodecContext *avctx) |
| { |
| HQXContext *ctx = avctx->priv_data; |
| int ret = ff_hqx_init_vlcs(ctx); |
| if (ret < 0) |
| hqx_decode_close(avctx); |
| return ret; |
| } |
| |
| AVCodec ff_hqx_decoder = { |
| .name = "hqx", |
| .long_name = NULL_IF_CONFIG_SMALL("Canopus HQX"), |
| .type = AVMEDIA_TYPE_VIDEO, |
| .id = AV_CODEC_ID_HQX, |
| .priv_data_size = sizeof(HQXContext), |
| .init = hqx_decode_init, |
| .decode = hqx_decode_frame, |
| .close = hqx_decode_close, |
| .capabilities = CODEC_CAP_DR1, |
| }; |
