mirror of
https://github.com/FFmpeg/FFmpeg.git
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02220b88fc
The majority of frame-threaded decoders (mainly the intra-only) need exactly one part of ThreadFrame: The AVFrame. They don't need the owners nor the progress, yet they had to use it because ff_thread_(get|release)_buffer() requires it. This commit changes this and makes these functions work with ordinary AVFrames; the decoders that need the extra fields for progress use ff_thread_(get|release)_ext_buffer() which work exactly as ff_thread_(get|release)_buffer() used to do. This also avoids some unnecessary allocations of progress AVBuffers, namely for H.264 and HEVC film grain frames: These frames are not used for synchronization and therefore don't need a ThreadFrame. Also move the ThreadFrame structure as well as ff_thread_ref_frame() to threadframe.h, the header for frame-threaded decoders with inter-frame dependencies. Reviewed-by: Anton Khirnov <anton@khirnov.net> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
710 lines
22 KiB
C
710 lines
22 KiB
C
/*
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* MagicYUV decoder
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* Copyright (c) 2016 Paul B Mahol
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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 <stdlib.h>
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#include <string.h>
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#define CACHED_BITSTREAM_READER !ARCH_X86_32
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#include "libavutil/pixdesc.h"
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#include "avcodec.h"
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#include "bytestream.h"
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#include "get_bits.h"
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#include "huffyuvdsp.h"
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#include "internal.h"
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#include "lossless_videodsp.h"
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#include "thread.h"
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typedef struct Slice {
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uint32_t start;
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uint32_t size;
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} Slice;
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typedef enum Prediction {
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LEFT = 1,
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GRADIENT,
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MEDIAN,
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} Prediction;
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typedef struct HuffEntry {
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uint8_t len;
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uint16_t sym;
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} HuffEntry;
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typedef struct MagicYUVContext {
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AVFrame *p;
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int max;
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int bps;
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int slice_height;
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int nb_slices;
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int planes; // number of encoded planes in bitstream
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int decorrelate; // postprocessing work
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int color_matrix; // video color matrix
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int flags;
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int interlaced; // video is interlaced
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const uint8_t *buf; // pointer to AVPacket->data
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int hshift[4];
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int vshift[4];
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Slice *slices[4]; // slice bitstream positions for each plane
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unsigned int slices_size[4]; // slice sizes for each plane
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VLC vlc[4]; // VLC for each plane
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int (*magy_decode_slice)(AVCodecContext *avctx, void *tdata,
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int j, int threadnr);
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LLVidDSPContext llviddsp;
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} MagicYUVContext;
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static int huff_build(const uint8_t len[], uint16_t codes_pos[33],
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VLC *vlc, int nb_elems, void *logctx)
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{
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HuffEntry he[4096];
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for (int i = 31; i > 0; i--)
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codes_pos[i] += codes_pos[i + 1];
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for (unsigned i = nb_elems; i-- > 0;)
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he[--codes_pos[len[i]]] = (HuffEntry){ len[i], i };
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ff_free_vlc(vlc);
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return ff_init_vlc_from_lengths(vlc, FFMIN(he[0].len, 12), nb_elems,
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&he[0].len, sizeof(he[0]),
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&he[0].sym, sizeof(he[0]), sizeof(he[0].sym),
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0, 0, logctx);
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}
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static void magicyuv_median_pred16(uint16_t *dst, const uint16_t *src1,
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const uint16_t *diff, intptr_t w,
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int *left, int *left_top, int max)
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{
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int i;
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uint16_t l, lt;
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l = *left;
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lt = *left_top;
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for (i = 0; i < w; i++) {
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l = mid_pred(l, src1[i], (l + src1[i] - lt)) + diff[i];
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l &= max;
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lt = src1[i];
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dst[i] = l;
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}
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*left = l;
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*left_top = lt;
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}
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static int magy_decode_slice10(AVCodecContext *avctx, void *tdata,
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int j, int threadnr)
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{
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MagicYUVContext *s = avctx->priv_data;
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int interlaced = s->interlaced;
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const int bps = s->bps;
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const int max = s->max - 1;
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AVFrame *p = s->p;
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int i, k, x;
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GetBitContext gb;
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uint16_t *dst;
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for (i = 0; i < s->planes; i++) {
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int left, lefttop, top;
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int height = AV_CEIL_RSHIFT(FFMIN(s->slice_height, avctx->coded_height - j * s->slice_height), s->vshift[i]);
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int width = AV_CEIL_RSHIFT(avctx->coded_width, s->hshift[i]);
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int sheight = AV_CEIL_RSHIFT(s->slice_height, s->vshift[i]);
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ptrdiff_t fake_stride = (p->linesize[i] / 2) * (1 + interlaced);
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ptrdiff_t stride = p->linesize[i] / 2;
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int flags, pred;
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int ret = init_get_bits8(&gb, s->buf + s->slices[i][j].start,
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s->slices[i][j].size);
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if (ret < 0)
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return ret;
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flags = get_bits(&gb, 8);
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pred = get_bits(&gb, 8);
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dst = (uint16_t *)p->data[i] + j * sheight * stride;
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if (flags & 1) {
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if (get_bits_left(&gb) < bps * width * height)
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return AVERROR_INVALIDDATA;
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for (k = 0; k < height; k++) {
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for (x = 0; x < width; x++)
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dst[x] = get_bits(&gb, bps);
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dst += stride;
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}
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} else {
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for (k = 0; k < height; k++) {
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for (x = 0; x < width; x++) {
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int pix;
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if (get_bits_left(&gb) <= 0)
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return AVERROR_INVALIDDATA;
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pix = get_vlc2(&gb, s->vlc[i].table, s->vlc[i].bits, 3);
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if (pix < 0)
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return AVERROR_INVALIDDATA;
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dst[x] = pix;
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}
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dst += stride;
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}
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}
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switch (pred) {
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case LEFT:
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dst = (uint16_t *)p->data[i] + j * sheight * stride;
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s->llviddsp.add_left_pred_int16(dst, dst, max, width, 0);
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dst += stride;
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if (interlaced) {
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s->llviddsp.add_left_pred_int16(dst, dst, max, width, 0);
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dst += stride;
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}
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for (k = 1 + interlaced; k < height; k++) {
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s->llviddsp.add_left_pred_int16(dst, dst, max, width, dst[-fake_stride]);
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dst += stride;
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}
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break;
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case GRADIENT:
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dst = (uint16_t *)p->data[i] + j * sheight * stride;
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s->llviddsp.add_left_pred_int16(dst, dst, max, width, 0);
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dst += stride;
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if (interlaced) {
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s->llviddsp.add_left_pred_int16(dst, dst, max, width, 0);
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dst += stride;
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}
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for (k = 1 + interlaced; k < height; k++) {
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top = dst[-fake_stride];
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left = top + dst[0];
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dst[0] = left & max;
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for (x = 1; x < width; x++) {
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top = dst[x - fake_stride];
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lefttop = dst[x - (fake_stride + 1)];
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left += top - lefttop + dst[x];
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dst[x] = left & max;
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}
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dst += stride;
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}
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break;
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case MEDIAN:
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dst = (uint16_t *)p->data[i] + j * sheight * stride;
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s->llviddsp.add_left_pred_int16(dst, dst, max, width, 0);
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dst += stride;
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if (interlaced) {
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s->llviddsp.add_left_pred_int16(dst, dst, max, width, 0);
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dst += stride;
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}
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lefttop = left = dst[0];
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for (k = 1 + interlaced; k < height; k++) {
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magicyuv_median_pred16(dst, dst - fake_stride, dst, width, &left, &lefttop, max);
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lefttop = left = dst[0];
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dst += stride;
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}
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break;
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default:
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avpriv_request_sample(avctx, "Unknown prediction: %d", pred);
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}
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}
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if (s->decorrelate) {
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int height = FFMIN(s->slice_height, avctx->coded_height - j * s->slice_height);
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int width = avctx->coded_width;
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uint16_t *r = (uint16_t *)p->data[0] + j * s->slice_height * p->linesize[0] / 2;
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uint16_t *g = (uint16_t *)p->data[1] + j * s->slice_height * p->linesize[1] / 2;
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uint16_t *b = (uint16_t *)p->data[2] + j * s->slice_height * p->linesize[2] / 2;
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for (i = 0; i < height; i++) {
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for (k = 0; k < width; k++) {
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b[k] = (b[k] + g[k]) & max;
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r[k] = (r[k] + g[k]) & max;
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}
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b += p->linesize[0] / 2;
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g += p->linesize[1] / 2;
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r += p->linesize[2] / 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 magy_decode_slice(AVCodecContext *avctx, void *tdata,
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int j, int threadnr)
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{
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MagicYUVContext *s = avctx->priv_data;
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int interlaced = s->interlaced;
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AVFrame *p = s->p;
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int i, k, x, min_width;
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GetBitContext gb;
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uint8_t *dst;
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for (i = 0; i < s->planes; i++) {
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int left, lefttop, top;
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int height = AV_CEIL_RSHIFT(FFMIN(s->slice_height, avctx->coded_height - j * s->slice_height), s->vshift[i]);
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int width = AV_CEIL_RSHIFT(avctx->coded_width, s->hshift[i]);
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int sheight = AV_CEIL_RSHIFT(s->slice_height, s->vshift[i]);
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ptrdiff_t fake_stride = p->linesize[i] * (1 + interlaced);
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ptrdiff_t stride = p->linesize[i];
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const uint8_t *slice = s->buf + s->slices[i][j].start;
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int flags, pred;
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flags = bytestream_get_byte(&slice);
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pred = bytestream_get_byte(&slice);
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dst = p->data[i] + j * sheight * stride;
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if (flags & 1) {
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if (s->slices[i][j].size - 2 < width * height)
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return AVERROR_INVALIDDATA;
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for (k = 0; k < height; k++) {
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bytestream_get_buffer(&slice, dst, width);
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dst += stride;
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}
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} else {
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int ret = init_get_bits8(&gb, slice, s->slices[i][j].size - 2);
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if (ret < 0)
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return ret;
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for (k = 0; k < height; k++) {
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for (x = 0; x < width; x++) {
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int pix;
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if (get_bits_left(&gb) <= 0)
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return AVERROR_INVALIDDATA;
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pix = get_vlc2(&gb, s->vlc[i].table, s->vlc[i].bits, 3);
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if (pix < 0)
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return AVERROR_INVALIDDATA;
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dst[x] = pix;
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}
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dst += stride;
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}
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}
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switch (pred) {
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case LEFT:
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dst = p->data[i] + j * sheight * stride;
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s->llviddsp.add_left_pred(dst, dst, width, 0);
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dst += stride;
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if (interlaced) {
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s->llviddsp.add_left_pred(dst, dst, width, 0);
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dst += stride;
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}
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for (k = 1 + interlaced; k < height; k++) {
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s->llviddsp.add_left_pred(dst, dst, width, dst[-fake_stride]);
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dst += stride;
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}
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break;
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case GRADIENT:
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dst = p->data[i] + j * sheight * stride;
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s->llviddsp.add_left_pred(dst, dst, width, 0);
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dst += stride;
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if (interlaced) {
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s->llviddsp.add_left_pred(dst, dst, width, 0);
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dst += stride;
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}
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min_width = FFMIN(width, 32);
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for (k = 1 + interlaced; k < height; k++) {
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top = dst[-fake_stride];
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left = top + dst[0];
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dst[0] = left;
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for (x = 1; x < min_width; x++) { /* dsp need aligned 32 */
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top = dst[x - fake_stride];
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lefttop = dst[x - (fake_stride + 1)];
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left += top - lefttop + dst[x];
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dst[x] = left;
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}
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if (width > 32)
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s->llviddsp.add_gradient_pred(dst + 32, fake_stride, width - 32);
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dst += stride;
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}
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break;
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case MEDIAN:
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dst = p->data[i] + j * sheight * stride;
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s->llviddsp.add_left_pred(dst, dst, width, 0);
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dst += stride;
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if (interlaced) {
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s->llviddsp.add_left_pred(dst, dst, width, 0);
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dst += stride;
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}
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lefttop = left = dst[0];
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for (k = 1 + interlaced; k < height; k++) {
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s->llviddsp.add_median_pred(dst, dst - fake_stride,
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dst, width, &left, &lefttop);
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lefttop = left = dst[0];
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dst += stride;
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}
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break;
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default:
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avpriv_request_sample(avctx, "Unknown prediction: %d", pred);
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}
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}
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if (s->decorrelate) {
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int height = FFMIN(s->slice_height, avctx->coded_height - j * s->slice_height);
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int width = avctx->coded_width;
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uint8_t *b = p->data[0] + j * s->slice_height * p->linesize[0];
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uint8_t *g = p->data[1] + j * s->slice_height * p->linesize[1];
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uint8_t *r = p->data[2] + j * s->slice_height * p->linesize[2];
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for (i = 0; i < height; i++) {
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s->llviddsp.add_bytes(b, g, width);
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s->llviddsp.add_bytes(r, g, width);
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b += p->linesize[0];
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g += p->linesize[1];
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r += p->linesize[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 build_huffman(AVCodecContext *avctx, const uint8_t *table,
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int table_size, int max)
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{
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MagicYUVContext *s = avctx->priv_data;
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GetByteContext gb;
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uint8_t len[4096];
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uint16_t length_count[33] = { 0 };
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int i = 0, j = 0, k;
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bytestream2_init(&gb, table, table_size);
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while (bytestream2_get_bytes_left(&gb) > 0) {
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int b = bytestream2_peek_byteu(&gb) & 0x80;
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int x = bytestream2_get_byteu(&gb) & ~0x80;
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int l = 1;
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if (b) {
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if (bytestream2_get_bytes_left(&gb) <= 0)
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break;
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l += bytestream2_get_byteu(&gb);
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}
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k = j + l;
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if (k > max || x == 0 || x > 32) {
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av_log(avctx, AV_LOG_ERROR, "Invalid Huffman codes\n");
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return AVERROR_INVALIDDATA;
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}
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length_count[x] += l;
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for (; j < k; j++)
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len[j] = x;
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if (j == max) {
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j = 0;
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if (huff_build(len, length_count, &s->vlc[i], max, avctx)) {
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av_log(avctx, AV_LOG_ERROR, "Cannot build Huffman codes\n");
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return AVERROR_INVALIDDATA;
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}
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i++;
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if (i == s->planes) {
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break;
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}
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memset(length_count, 0, sizeof(length_count));
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}
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}
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if (i != s->planes) {
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av_log(avctx, AV_LOG_ERROR, "Huffman tables too short\n");
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return AVERROR_INVALIDDATA;
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}
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return 0;
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}
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static int magy_decode_frame(AVCodecContext *avctx, void *data,
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int *got_frame, AVPacket *avpkt)
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{
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MagicYUVContext *s = avctx->priv_data;
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AVFrame *p = data;
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GetByteContext gb;
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uint32_t first_offset, offset, next_offset, header_size, slice_width;
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int width, height, format, version, table_size;
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int ret, i, j;
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if (avpkt->size < 36)
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return AVERROR_INVALIDDATA;
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bytestream2_init(&gb, avpkt->data, avpkt->size);
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if (bytestream2_get_le32u(&gb) != MKTAG('M', 'A', 'G', 'Y'))
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return AVERROR_INVALIDDATA;
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header_size = bytestream2_get_le32u(&gb);
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if (header_size < 32 || header_size >= avpkt->size) {
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av_log(avctx, AV_LOG_ERROR,
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"header or packet too small %"PRIu32"\n", header_size);
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return AVERROR_INVALIDDATA;
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}
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version = bytestream2_get_byteu(&gb);
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if (version != 7) {
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avpriv_request_sample(avctx, "Version %d", version);
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return AVERROR_PATCHWELCOME;
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}
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s->hshift[1] =
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s->vshift[1] =
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s->hshift[2] =
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s->vshift[2] = 0;
|
|
s->decorrelate = 0;
|
|
s->bps = 8;
|
|
|
|
format = bytestream2_get_byteu(&gb);
|
|
switch (format) {
|
|
case 0x65:
|
|
avctx->pix_fmt = AV_PIX_FMT_GBRP;
|
|
s->decorrelate = 1;
|
|
break;
|
|
case 0x66:
|
|
avctx->pix_fmt = AV_PIX_FMT_GBRAP;
|
|
s->decorrelate = 1;
|
|
break;
|
|
case 0x67:
|
|
avctx->pix_fmt = AV_PIX_FMT_YUV444P;
|
|
break;
|
|
case 0x68:
|
|
avctx->pix_fmt = AV_PIX_FMT_YUV422P;
|
|
s->hshift[1] =
|
|
s->hshift[2] = 1;
|
|
break;
|
|
case 0x69:
|
|
avctx->pix_fmt = AV_PIX_FMT_YUV420P;
|
|
s->hshift[1] =
|
|
s->vshift[1] =
|
|
s->hshift[2] =
|
|
s->vshift[2] = 1;
|
|
break;
|
|
case 0x6a:
|
|
avctx->pix_fmt = AV_PIX_FMT_YUVA444P;
|
|
break;
|
|
case 0x6b:
|
|
avctx->pix_fmt = AV_PIX_FMT_GRAY8;
|
|
break;
|
|
case 0x6c:
|
|
avctx->pix_fmt = AV_PIX_FMT_YUV422P10;
|
|
s->hshift[1] =
|
|
s->hshift[2] = 1;
|
|
s->bps = 10;
|
|
break;
|
|
case 0x76:
|
|
avctx->pix_fmt = AV_PIX_FMT_YUV444P10;
|
|
s->bps = 10;
|
|
break;
|
|
case 0x6d:
|
|
avctx->pix_fmt = AV_PIX_FMT_GBRP10;
|
|
s->decorrelate = 1;
|
|
s->bps = 10;
|
|
break;
|
|
case 0x6e:
|
|
avctx->pix_fmt = AV_PIX_FMT_GBRAP10;
|
|
s->decorrelate = 1;
|
|
s->bps = 10;
|
|
break;
|
|
case 0x6f:
|
|
avctx->pix_fmt = AV_PIX_FMT_GBRP12;
|
|
s->decorrelate = 1;
|
|
s->bps = 12;
|
|
break;
|
|
case 0x70:
|
|
avctx->pix_fmt = AV_PIX_FMT_GBRAP12;
|
|
s->decorrelate = 1;
|
|
s->bps = 12;
|
|
break;
|
|
case 0x73:
|
|
avctx->pix_fmt = AV_PIX_FMT_GRAY10;
|
|
s->bps = 10;
|
|
break;
|
|
case 0x7b:
|
|
avctx->pix_fmt = AV_PIX_FMT_YUV420P10;
|
|
s->hshift[1] =
|
|
s->vshift[1] =
|
|
s->hshift[2] =
|
|
s->vshift[2] = 1;
|
|
s->bps = 10;
|
|
break;
|
|
default:
|
|
avpriv_request_sample(avctx, "Format 0x%X", format);
|
|
return AVERROR_PATCHWELCOME;
|
|
}
|
|
s->max = 1 << s->bps;
|
|
s->magy_decode_slice = s->bps == 8 ? magy_decode_slice : magy_decode_slice10;
|
|
s->planes = av_pix_fmt_count_planes(avctx->pix_fmt);
|
|
|
|
bytestream2_skipu(&gb, 1);
|
|
s->color_matrix = bytestream2_get_byteu(&gb);
|
|
s->flags = bytestream2_get_byteu(&gb);
|
|
s->interlaced = !!(s->flags & 2);
|
|
bytestream2_skipu(&gb, 3);
|
|
|
|
width = bytestream2_get_le32u(&gb);
|
|
height = bytestream2_get_le32u(&gb);
|
|
ret = ff_set_dimensions(avctx, width, height);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
slice_width = bytestream2_get_le32u(&gb);
|
|
if (slice_width != avctx->coded_width) {
|
|
avpriv_request_sample(avctx, "Slice width %"PRIu32, slice_width);
|
|
return AVERROR_PATCHWELCOME;
|
|
}
|
|
s->slice_height = bytestream2_get_le32u(&gb);
|
|
if (s->slice_height <= 0 || s->slice_height > INT_MAX - avctx->coded_height) {
|
|
av_log(avctx, AV_LOG_ERROR,
|
|
"invalid slice height: %d\n", s->slice_height);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
bytestream2_skipu(&gb, 4);
|
|
|
|
s->nb_slices = (avctx->coded_height + s->slice_height - 1) / s->slice_height;
|
|
if (s->nb_slices > INT_MAX / FFMAX(sizeof(Slice), 4 * 5)) {
|
|
av_log(avctx, AV_LOG_ERROR,
|
|
"invalid number of slices: %d\n", s->nb_slices);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
if (s->interlaced) {
|
|
if ((s->slice_height >> s->vshift[1]) < 2) {
|
|
av_log(avctx, AV_LOG_ERROR, "impossible slice height\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
if ((avctx->coded_height % s->slice_height) && ((avctx->coded_height % s->slice_height) >> s->vshift[1]) < 2) {
|
|
av_log(avctx, AV_LOG_ERROR, "impossible height\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
}
|
|
|
|
if (bytestream2_get_bytes_left(&gb) <= s->nb_slices * s->planes * 5)
|
|
return AVERROR_INVALIDDATA;
|
|
for (i = 0; i < s->planes; i++) {
|
|
av_fast_malloc(&s->slices[i], &s->slices_size[i], s->nb_slices * sizeof(Slice));
|
|
if (!s->slices[i])
|
|
return AVERROR(ENOMEM);
|
|
|
|
offset = bytestream2_get_le32u(&gb);
|
|
if (offset >= avpkt->size - header_size)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
if (i == 0)
|
|
first_offset = offset;
|
|
|
|
for (j = 0; j < s->nb_slices - 1; j++) {
|
|
s->slices[i][j].start = offset + header_size;
|
|
|
|
next_offset = bytestream2_get_le32u(&gb);
|
|
if (next_offset <= offset || next_offset >= avpkt->size - header_size)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
s->slices[i][j].size = next_offset - offset;
|
|
if (s->slices[i][j].size < 2)
|
|
return AVERROR_INVALIDDATA;
|
|
offset = next_offset;
|
|
}
|
|
|
|
s->slices[i][j].start = offset + header_size;
|
|
s->slices[i][j].size = avpkt->size - s->slices[i][j].start;
|
|
|
|
if (s->slices[i][j].size < 2)
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
if (bytestream2_get_byteu(&gb) != s->planes)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
bytestream2_skipu(&gb, s->nb_slices * s->planes);
|
|
|
|
table_size = header_size + first_offset - bytestream2_tell(&gb);
|
|
if (table_size < 2)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
ret = build_huffman(avctx, avpkt->data + bytestream2_tell(&gb),
|
|
table_size, s->max);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
p->pict_type = AV_PICTURE_TYPE_I;
|
|
p->key_frame = 1;
|
|
|
|
if ((ret = ff_thread_get_buffer(avctx, p, 0)) < 0)
|
|
return ret;
|
|
|
|
s->buf = avpkt->data;
|
|
s->p = p;
|
|
avctx->execute2(avctx, s->magy_decode_slice, NULL, NULL, s->nb_slices);
|
|
|
|
if (avctx->pix_fmt == AV_PIX_FMT_GBRP ||
|
|
avctx->pix_fmt == AV_PIX_FMT_GBRAP ||
|
|
avctx->pix_fmt == AV_PIX_FMT_GBRP10 ||
|
|
avctx->pix_fmt == AV_PIX_FMT_GBRAP10||
|
|
avctx->pix_fmt == AV_PIX_FMT_GBRAP12||
|
|
avctx->pix_fmt == AV_PIX_FMT_GBRP12) {
|
|
FFSWAP(uint8_t*, p->data[0], p->data[1]);
|
|
FFSWAP(int, p->linesize[0], p->linesize[1]);
|
|
} else {
|
|
switch (s->color_matrix) {
|
|
case 1:
|
|
p->colorspace = AVCOL_SPC_BT470BG;
|
|
break;
|
|
case 2:
|
|
p->colorspace = AVCOL_SPC_BT709;
|
|
break;
|
|
}
|
|
p->color_range = (s->flags & 4) ? AVCOL_RANGE_JPEG : AVCOL_RANGE_MPEG;
|
|
}
|
|
|
|
*got_frame = 1;
|
|
|
|
return avpkt->size;
|
|
}
|
|
|
|
static av_cold int magy_decode_init(AVCodecContext *avctx)
|
|
{
|
|
MagicYUVContext *s = avctx->priv_data;
|
|
ff_llviddsp_init(&s->llviddsp);
|
|
return 0;
|
|
}
|
|
|
|
static av_cold int magy_decode_end(AVCodecContext *avctx)
|
|
{
|
|
MagicYUVContext * const s = avctx->priv_data;
|
|
int i;
|
|
|
|
for (i = 0; i < FF_ARRAY_ELEMS(s->slices); i++) {
|
|
av_freep(&s->slices[i]);
|
|
s->slices_size[i] = 0;
|
|
ff_free_vlc(&s->vlc[i]);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
const AVCodec ff_magicyuv_decoder = {
|
|
.name = "magicyuv",
|
|
.long_name = NULL_IF_CONFIG_SMALL("MagicYUV video"),
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = AV_CODEC_ID_MAGICYUV,
|
|
.priv_data_size = sizeof(MagicYUVContext),
|
|
.init = magy_decode_init,
|
|
.close = magy_decode_end,
|
|
.decode = magy_decode_frame,
|
|
.capabilities = AV_CODEC_CAP_DR1 |
|
|
AV_CODEC_CAP_FRAME_THREADS |
|
|
AV_CODEC_CAP_SLICE_THREADS,
|
|
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
|
|
};
|