397 lines
12 KiB
C
397 lines
12 KiB
C
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/*
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* Canopus HQ/HQA 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 <stdint.h>
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#include "libavutil/attributes.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 "hq_hqa.h"
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#include "hq_hqadsp.h"
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/* HQ/HQA slices are a set of macroblocks belonging to a frame, and
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* they usually form a pseudorandom pattern (probably because it is
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* nicer to display on partial decode).
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*
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* For HQA it just happens that each slice is on every 8th macroblock,
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* but they can be on any frame width like
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* X.......X.
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* ......X...
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* ....X.....
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* ..X.......
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* etc.
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*
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* The original decoder has special handling for edge macroblocks,
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* while lavc simply aligns coded_width and coded_height.
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*/
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static inline void put_blocks(HQContext *c, AVFrame *pic,
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int plane, int x, int y, int ilace,
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int16_t *block0, int16_t *block1)
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{
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uint8_t *p = pic->data[plane] + x;
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c->hqhqadsp.idct_put(p + y * pic->linesize[plane],
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pic->linesize[plane] << ilace, block0);
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c->hqhqadsp.idct_put(p + (y + (ilace ? 1 : 8)) * pic->linesize[plane],
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pic->linesize[plane] << ilace, block1);
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}
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static int hq_decode_block(HQContext *c, GetBitContext *gb, int16_t block[64],
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int qsel, int is_chroma, int is_hqa)
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{
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const int32_t *q;
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int val, pos = 1;
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memset(block, 0, 64 * sizeof(*block));
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if (!is_hqa) {
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block[0] = get_sbits(gb, 9) * 64;
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q = ff_hq_quants[qsel][is_chroma][get_bits(gb, 2)];
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} else {
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q = ff_hq_quants[qsel][is_chroma][get_bits(gb, 2)];
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block[0] = get_sbits(gb, 9) * 64;
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}
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for (;;) {
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val = get_vlc2(gb, c->hq_ac_vlc.table, 9, 2);
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if (val < 0)
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return AVERROR_INVALIDDATA;
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pos += ff_hq_ac_skips[val];
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if (pos >= 64)
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break;
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block[ff_zigzag_direct[pos]] = (int)(ff_hq_ac_syms[val] * (unsigned)q[pos]) >> 12;
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pos++;
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}
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return 0;
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}
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static int hq_decode_mb(HQContext *c, AVFrame *pic,
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GetBitContext *gb, int x, int y)
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{
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int qgroup, flag;
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int i, ret;
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qgroup = get_bits(gb, 4);
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flag = get_bits1(gb);
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for (i = 0; i < 8; i++) {
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ret = hq_decode_block(c, gb, c->block[i], qgroup, i >= 4, 0);
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if (ret < 0)
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return ret;
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}
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put_blocks(c, pic, 0, x, y, flag, c->block[0], c->block[2]);
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put_blocks(c, pic, 0, x + 8, y, flag, c->block[1], c->block[3]);
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put_blocks(c, pic, 2, x >> 1, y, flag, c->block[4], c->block[5]);
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put_blocks(c, pic, 1, x >> 1, y, flag, c->block[6], c->block[7]);
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return 0;
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}
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static int hq_decode_frame(HQContext *ctx, AVFrame *pic,
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int prof_num, size_t data_size)
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{
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const HQProfile *profile;
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GetBitContext gb;
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const uint8_t *perm, *src = ctx->gbc.buffer;
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uint32_t slice_off[21];
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int slice, start_off, next_off, i, ret;
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if ((unsigned)prof_num >= NUM_HQ_PROFILES) {
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profile = &ff_hq_profile[0];
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avpriv_request_sample(ctx->avctx, "HQ Profile %d", prof_num);
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} else {
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profile = &ff_hq_profile[prof_num];
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av_log(ctx->avctx, AV_LOG_VERBOSE, "HQ Profile %d\n", prof_num);
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}
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ctx->avctx->coded_width = FFALIGN(profile->width, 16);
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ctx->avctx->coded_height = FFALIGN(profile->height, 16);
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ctx->avctx->width = profile->width;
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ctx->avctx->height = profile->height;
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ctx->avctx->bits_per_raw_sample = 8;
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ctx->avctx->pix_fmt = AV_PIX_FMT_YUV422P;
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ret = ff_get_buffer(ctx->avctx, pic, 0);
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if (ret < 0)
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return ret;
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/* Offsets are stored from CUV position, so adjust them accordingly. */
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for (i = 0; i < profile->num_slices + 1; i++)
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slice_off[i] = bytestream2_get_be24(&ctx->gbc) - 4;
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next_off = 0;
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for (slice = 0; slice < profile->num_slices; slice++) {
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start_off = next_off;
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next_off = profile->tab_h * (slice + 1) / profile->num_slices;
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perm = profile->perm_tab + start_off * profile->tab_w * 2;
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if (slice_off[slice] < (profile->num_slices + 1) * 3 ||
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slice_off[slice] >= slice_off[slice + 1] ||
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slice_off[slice + 1] > data_size) {
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av_log(ctx->avctx, AV_LOG_ERROR,
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"Invalid slice size %"SIZE_SPECIFIER".\n", data_size);
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break;
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}
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init_get_bits(&gb, src + slice_off[slice],
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(slice_off[slice + 1] - slice_off[slice]) * 8);
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for (i = 0; i < (next_off - start_off) * profile->tab_w; i++) {
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ret = hq_decode_mb(ctx, pic, &gb, perm[0] * 16, perm[1] * 16);
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if (ret < 0) {
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av_log(ctx->avctx, AV_LOG_ERROR,
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"Error decoding macroblock %d at slice %d.\n", i, slice);
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return ret;
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}
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perm += 2;
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}
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}
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return 0;
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}
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static int hqa_decode_mb(HQContext *c, AVFrame *pic, int qgroup,
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GetBitContext *gb, int x, int y)
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{
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int flag = 0;
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int i, ret, cbp;
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if (get_bits_left(gb) < 1)
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return AVERROR_INVALIDDATA;
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cbp = get_vlc2(gb, c->hqa_cbp_vlc.table, 5, 1);
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for (i = 0; i < 12; i++)
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memset(c->block[i], 0, sizeof(*c->block));
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for (i = 0; i < 12; i++)
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c->block[i][0] = -128 * (1 << 6);
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if (cbp) {
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flag = get_bits1(gb);
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cbp |= cbp << 4;
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if (cbp & 0x3)
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cbp |= 0x500;
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if (cbp & 0xC)
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cbp |= 0xA00;
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for (i = 0; i < 12; i++) {
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if (!(cbp & (1 << i)))
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continue;
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ret = hq_decode_block(c, gb, c->block[i], qgroup, i >= 8, 1);
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if (ret < 0)
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return ret;
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}
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}
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put_blocks(c, pic, 3, x, y, flag, c->block[ 0], c->block[ 2]);
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put_blocks(c, pic, 3, x + 8, y, flag, c->block[ 1], c->block[ 3]);
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put_blocks(c, pic, 0, x, y, flag, c->block[ 4], c->block[ 6]);
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put_blocks(c, pic, 0, x + 8, y, flag, c->block[ 5], c->block[ 7]);
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put_blocks(c, pic, 2, x >> 1, y, flag, c->block[ 8], c->block[ 9]);
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put_blocks(c, pic, 1, x >> 1, y, flag, c->block[10], c->block[11]);
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return 0;
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}
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static int hqa_decode_slice(HQContext *ctx, AVFrame *pic, GetBitContext *gb,
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int quant, int slice_no, int w, int h)
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{
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int i, j, off;
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int ret;
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for (i = 0; i < h; i += 16) {
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off = (slice_no * 16 + i * 3) & 0x70;
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for (j = off; j < w; j += 128) {
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ret = hqa_decode_mb(ctx, pic, quant, gb, j, i);
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if (ret < 0) {
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av_log(ctx->avctx, AV_LOG_ERROR,
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"Error decoding macroblock at %dx%d.\n", i, j);
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return ret;
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}
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}
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}
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return 0;
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}
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static int hqa_decode_frame(HQContext *ctx, AVFrame *pic, size_t data_size)
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{
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GetBitContext gb;
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const int num_slices = 8;
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uint32_t slice_off[9];
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int i, slice, ret;
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int width, height, quant;
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const uint8_t *src = ctx->gbc.buffer;
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if (bytestream2_get_bytes_left(&ctx->gbc) < 8 + 4*(num_slices + 1))
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return AVERROR_INVALIDDATA;
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width = bytestream2_get_be16(&ctx->gbc);
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height = bytestream2_get_be16(&ctx->gbc);
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ret = ff_set_dimensions(ctx->avctx, width, height);
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if (ret < 0)
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return ret;
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ctx->avctx->coded_width = FFALIGN(width, 16);
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ctx->avctx->coded_height = FFALIGN(height, 16);
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ctx->avctx->bits_per_raw_sample = 8;
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ctx->avctx->pix_fmt = AV_PIX_FMT_YUVA422P;
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av_log(ctx->avctx, AV_LOG_VERBOSE, "HQA Profile\n");
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quant = bytestream2_get_byte(&ctx->gbc);
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bytestream2_skip(&ctx->gbc, 3);
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if (quant >= NUM_HQ_QUANTS) {
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av_log(ctx->avctx, AV_LOG_ERROR,
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"Invalid quantization matrix %d.\n", quant);
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return AVERROR_INVALIDDATA;
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}
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ret = ff_get_buffer(ctx->avctx, pic, 0);
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if (ret < 0)
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return ret;
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/* Offsets are stored from HQA1 position, so adjust them accordingly. */
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for (i = 0; i < num_slices + 1; i++)
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slice_off[i] = bytestream2_get_be32(&ctx->gbc) - 4;
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for (slice = 0; slice < num_slices; slice++) {
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if (slice_off[slice] < (num_slices + 1) * 3 ||
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slice_off[slice] >= slice_off[slice + 1] ||
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slice_off[slice + 1] > data_size) {
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av_log(ctx->avctx, AV_LOG_ERROR,
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"Invalid slice size %"SIZE_SPECIFIER".\n", data_size);
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break;
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}
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init_get_bits(&gb, src + slice_off[slice],
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(slice_off[slice + 1] - slice_off[slice]) * 8);
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ret = hqa_decode_slice(ctx, pic, &gb, quant, slice, width, height);
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if (ret < 0)
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return ret;
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}
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return 0;
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}
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static int hq_hqa_decode_frame(AVCodecContext *avctx, void *data,
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int *got_frame, AVPacket *avpkt)
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{
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HQContext *ctx = avctx->priv_data;
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AVFrame *pic = data;
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uint32_t info_tag;
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unsigned int data_size;
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int ret;
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unsigned tag;
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bytestream2_init(&ctx->gbc, avpkt->data, avpkt->size);
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if (bytestream2_get_bytes_left(&ctx->gbc) < 4 + 4) {
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av_log(avctx, AV_LOG_ERROR, "Frame is too small (%d).\n", avpkt->size);
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return AVERROR_INVALIDDATA;
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}
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info_tag = bytestream2_peek_le32(&ctx->gbc);
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if (info_tag == MKTAG('I', 'N', 'F', 'O')) {
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int info_size;
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bytestream2_skip(&ctx->gbc, 4);
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info_size = bytestream2_get_le32(&ctx->gbc);
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if (info_size < 0 || bytestream2_get_bytes_left(&ctx->gbc) < info_size) {
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av_log(avctx, AV_LOG_ERROR, "Invalid INFO size (%d).\n", info_size);
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return AVERROR_INVALIDDATA;
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}
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ff_canopus_parse_info_tag(avctx, ctx->gbc.buffer, info_size);
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bytestream2_skip(&ctx->gbc, info_size);
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}
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data_size = bytestream2_get_bytes_left(&ctx->gbc);
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if (data_size < 4) {
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av_log(avctx, AV_LOG_ERROR, "Frame is too small (%d).\n", data_size);
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return AVERROR_INVALIDDATA;
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}
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/* HQ defines dimensions and number of slices, and thus slice traversal
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* order. HQA has no size constraint and a fixed number of slices, so it
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* needs a separate scheme for it. */
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tag = bytestream2_get_le32(&ctx->gbc);
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if ((tag & 0x00FFFFFF) == (MKTAG('U', 'V', 'C', ' ') & 0x00FFFFFF)) {
|
||
|
|
ret = hq_decode_frame(ctx, pic, tag >> 24, data_size);
|
||
|
|
} else if (tag == MKTAG('H', 'Q', 'A', '1')) {
|
||
|
|
ret = hqa_decode_frame(ctx, pic, data_size);
|
||
|
|
} else {
|
||
|
|
av_log(avctx, AV_LOG_ERROR, "Not a HQ/HQA frame.\n");
|
||
|
|
return AVERROR_INVALIDDATA;
|
||
|
|
}
|
||
|
|
if (ret < 0) {
|
||
|
|
av_log(avctx, AV_LOG_ERROR, "Error decoding frame.\n");
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
pic->key_frame = 1;
|
||
|
|
pic->pict_type = AV_PICTURE_TYPE_I;
|
||
|
|
|
||
|
|
*got_frame = 1;
|
||
|
|
|
||
|
|
return avpkt->size;
|
||
|
|
}
|
||
|
|
|
||
|
|
static av_cold int hq_hqa_decode_init(AVCodecContext *avctx)
|
||
|
|
{
|
||
|
|
HQContext *ctx = avctx->priv_data;
|
||
|
|
ctx->avctx = avctx;
|
||
|
|
|
||
|
|
ff_hqdsp_init(&ctx->hqhqadsp);
|
||
|
|
|
||
|
|
return ff_hq_init_vlcs(ctx);
|
||
|
|
}
|
||
|
|
|
||
|
|
static av_cold int hq_hqa_decode_close(AVCodecContext *avctx)
|
||
|
|
{
|
||
|
|
HQContext *ctx = avctx->priv_data;
|
||
|
|
|
||
|
|
ff_free_vlc(&ctx->hq_ac_vlc);
|
||
|
|
ff_free_vlc(&ctx->hqa_cbp_vlc);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
AVCodec ff_hq_hqa_decoder = {
|
||
|
|
.name = "hq_hqa",
|
||
|
|
.long_name = NULL_IF_CONFIG_SMALL("Canopus HQ/HQA"),
|
||
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
||
|
|
.id = AV_CODEC_ID_HQ_HQA,
|
||
|
|
.priv_data_size = sizeof(HQContext),
|
||
|
|
.init = hq_hqa_decode_init,
|
||
|
|
.decode = hq_hqa_decode_frame,
|
||
|
|
.close = hq_hqa_decode_close,
|
||
|
|
.capabilities = AV_CODEC_CAP_DR1,
|
||
|
|
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE |
|
||
|
|
FF_CODEC_CAP_INIT_CLEANUP,
|
||
|
|
};
|