early-access version 1432
This commit is contained in:
pineappleEA
691
externals/ffmpeg/libavcodec/pixlet.c
vendored
Executable file
691
externals/ffmpeg/libavcodec/pixlet.c
vendored
Executable file
@@ -0,0 +1,691 @@
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/*
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* Apple Pixlet 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 <stdint.h>
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#include "libavutil/imgutils.h"
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#include "libavutil/intmath.h"
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#include "libavutil/opt.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 "internal.h"
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#include "thread.h"
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#include "unary.h"
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#define NB_LEVELS 4
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#define PIXLET_MAGIC 0xDEADBEEF
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#define H 0
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#define V 1
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typedef struct SubBand {
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unsigned width, height;
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unsigned size;
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unsigned x, y;
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} SubBand;
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typedef struct PixletContext {
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AVClass *class;
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GetByteContext gb;
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GetBitContext bc;
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int levels;
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int depth;
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int w, h;
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int16_t *filter[2];
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int16_t *prediction;
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int64_t scaling[4][2][NB_LEVELS];
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SubBand band[4][NB_LEVELS * 3 + 1];
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} PixletContext;
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static av_cold int pixlet_init(AVCodecContext *avctx)
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{
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avctx->pix_fmt = AV_PIX_FMT_YUV420P16;
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avctx->color_range = AVCOL_RANGE_JPEG;
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return 0;
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}
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static void free_buffers(AVCodecContext *avctx)
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{
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PixletContext *ctx = avctx->priv_data;
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av_freep(&ctx->filter[0]);
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av_freep(&ctx->filter[1]);
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av_freep(&ctx->prediction);
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}
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static av_cold int pixlet_close(AVCodecContext *avctx)
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{
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PixletContext *ctx = avctx->priv_data;
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free_buffers(avctx);
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ctx->w = 0;
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ctx->h = 0;
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return 0;
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}
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static int init_decoder(AVCodecContext *avctx)
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{
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PixletContext *ctx = avctx->priv_data;
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int i, plane;
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ctx->filter[0] = av_malloc_array(ctx->h, sizeof(int16_t));
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ctx->filter[1] = av_malloc_array(FFMAX(ctx->h, ctx->w) + 16, sizeof(int16_t));
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ctx->prediction = av_malloc_array((ctx->w >> NB_LEVELS), sizeof(int16_t));
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if (!ctx->filter[0] || !ctx->filter[1] || !ctx->prediction)
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return AVERROR(ENOMEM);
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for (plane = 0; plane < 3; plane++) {
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unsigned shift = plane > 0;
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unsigned w = ctx->w >> shift;
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unsigned h = ctx->h >> shift;
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ctx->band[plane][0].width = w >> NB_LEVELS;
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ctx->band[plane][0].height = h >> NB_LEVELS;
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ctx->band[plane][0].size = (w >> NB_LEVELS) * (h >> NB_LEVELS);
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for (i = 0; i < NB_LEVELS * 3; i++) {
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unsigned scale = ctx->levels - (i / 3);
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ctx->band[plane][i + 1].width = w >> scale;
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ctx->band[plane][i + 1].height = h >> scale;
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ctx->band[plane][i + 1].size = (w >> scale) * (h >> scale);
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ctx->band[plane][i + 1].x = (w >> scale) * (((i + 1) % 3) != 2);
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ctx->band[plane][i + 1].y = (h >> scale) * (((i + 1) % 3) != 1);
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}
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}
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return 0;
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}
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static int read_low_coeffs(AVCodecContext *avctx, int16_t *dst, int size,
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int width, ptrdiff_t stride)
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{
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PixletContext *ctx = avctx->priv_data;
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GetBitContext *bc = &ctx->bc;
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unsigned cnt1, nbits, k, j = 0, i = 0;
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int64_t value, state = 3;
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int rlen, escape, flag = 0;
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while (i < size) {
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nbits = FFMIN(ff_clz((state >> 8) + 3) ^ 0x1F, 14);
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cnt1 = get_unary(bc, 0, 8);
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if (cnt1 < 8) {
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value = show_bits(bc, nbits);
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if (value <= 1) {
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skip_bits(bc, nbits - 1);
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escape = ((1 << nbits) - 1) * cnt1;
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} else {
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skip_bits(bc, nbits);
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escape = value + ((1 << nbits) - 1) * cnt1 - 1;
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}
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} else {
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escape = get_bits(bc, 16);
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}
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value = -((escape + flag) & 1) | 1;
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dst[j++] = value * ((escape + flag + 1) >> 1);
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i++;
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if (j == width) {
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j = 0;
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dst += stride;
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}
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state = 120 * (escape + flag) + state - (120 * state >> 8);
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flag = 0;
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if (state * 4ULL > 0xFF || i >= size)
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continue;
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nbits = ((state + 8) >> 5) + (state ? ff_clz(state) : 32) - 24;
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escape = av_mod_uintp2(16383, nbits);
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cnt1 = get_unary(bc, 0, 8);
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if (cnt1 > 7) {
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rlen = get_bits(bc, 16);
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} else {
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value = show_bits(bc, nbits);
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if (value > 1) {
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skip_bits(bc, nbits);
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rlen = value + escape * cnt1 - 1;
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} else {
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skip_bits(bc, nbits - 1);
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rlen = escape * cnt1;
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}
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}
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if (rlen > size - i)
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return AVERROR_INVALIDDATA;
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i += rlen;
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for (k = 0; k < rlen; k++) {
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dst[j++] = 0;
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if (j == width) {
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j = 0;
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dst += stride;
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}
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}
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state = 0;
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flag = rlen < 0xFFFF ? 1 : 0;
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}
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align_get_bits(bc);
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return get_bits_count(bc) >> 3;
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}
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static int read_high_coeffs(AVCodecContext *avctx, uint8_t *src, int16_t *dst,
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int size, int c, int a, int d,
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int width, ptrdiff_t stride)
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{
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PixletContext *ctx = avctx->priv_data;
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GetBitContext *bc = &ctx->bc;
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unsigned cnt1, shbits, rlen, nbits, length, i = 0, j = 0, k;
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int ret, escape, pfx, value, yflag, xflag, flag = 0;
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int64_t state = 3, tmp;
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ret = init_get_bits8(bc, src, bytestream2_get_bytes_left(&ctx->gb));
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if (ret < 0)
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return ret;
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if (a ^ (a >> 31)) {
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nbits = 33 - ff_clz(a ^ (a >> 31));
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if (nbits > 16)
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return AVERROR_INVALIDDATA;
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} else {
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nbits = 1;
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}
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length = 25 - nbits;
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while (i < size) {
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if (((state >> 8) + 3) & 0xFFFFFFF)
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value = ff_clz((state >> 8) + 3) ^ 0x1F;
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else
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value = -1;
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cnt1 = get_unary(bc, 0, length);
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if (cnt1 >= length) {
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cnt1 = get_bits(bc, nbits);
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} else {
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pfx = 14 + ((((uint64_t)(value - 14)) >> 32) & (value - 14));
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if (pfx < 1 || pfx > 25)
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return AVERROR_INVALIDDATA;
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cnt1 *= (1 << pfx) - 1;
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shbits = show_bits(bc, pfx);
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if (shbits <= 1) {
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skip_bits(bc, pfx - 1);
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} else {
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skip_bits(bc, pfx);
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cnt1 += shbits - 1;
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}
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}
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xflag = flag + cnt1;
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yflag = xflag;
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if (flag + cnt1 == 0) {
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value = 0;
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} else {
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xflag &= 1u;
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tmp = (int64_t)c * ((yflag + 1) >> 1) + (c >> 1);
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value = xflag + (tmp ^ -xflag);
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}
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i++;
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dst[j++] = value;
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if (j == width) {
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j = 0;
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dst += stride;
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}
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state += (int64_t)d * (uint64_t)yflag - ((int64_t)(d * (uint64_t)state) >> 8);
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flag = 0;
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if ((uint64_t)state > 0xFF / 4 || i >= size)
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continue;
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pfx = ((state + 8) >> 5) + (state ? ff_clz(state) : 32) - 24;
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escape = av_mod_uintp2(16383, pfx);
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cnt1 = get_unary(bc, 0, 8);
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if (cnt1 < 8) {
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if (pfx < 1 || pfx > 25)
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return AVERROR_INVALIDDATA;
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value = show_bits(bc, pfx);
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if (value > 1) {
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skip_bits(bc, pfx);
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rlen = value + escape * cnt1 - 1;
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} else {
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skip_bits(bc, pfx - 1);
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rlen = escape * cnt1;
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}
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} else {
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if (get_bits1(bc))
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value = get_bits(bc, 16);
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else
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value = get_bits(bc, 8);
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rlen = value + 8 * escape;
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}
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if (rlen > 0xFFFF || i + rlen > size)
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return AVERROR_INVALIDDATA;
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i += rlen;
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for (k = 0; k < rlen; k++) {
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dst[j++] = 0;
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if (j == width) {
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j = 0;
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dst += stride;
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}
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}
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state = 0;
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flag = rlen < 0xFFFF ? 1 : 0;
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}
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align_get_bits(bc);
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return get_bits_count(bc) >> 3;
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}
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static int read_highpass(AVCodecContext *avctx, uint8_t *ptr,
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int plane, AVFrame *frame)
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{
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PixletContext *ctx = avctx->priv_data;
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ptrdiff_t stride = frame->linesize[plane] / 2;
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int i, ret;
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for (i = 0; i < ctx->levels * 3; i++) {
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int32_t a = bytestream2_get_be32(&ctx->gb);
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int32_t b = bytestream2_get_be32(&ctx->gb);
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int32_t c = bytestream2_get_be32(&ctx->gb);
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int32_t d = bytestream2_get_be32(&ctx->gb);
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int16_t *dest = (int16_t *)frame->data[plane] +
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ctx->band[plane][i + 1].x +
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ctx->band[plane][i + 1].y * stride;
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unsigned size = ctx->band[plane][i + 1].size;
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uint32_t magic = bytestream2_get_be32(&ctx->gb);
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if (magic != PIXLET_MAGIC) {
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av_log(avctx, AV_LOG_ERROR,
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"wrong magic number: 0x%08"PRIX32" for plane %d, band %d\n",
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magic, plane, i);
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return AVERROR_INVALIDDATA;
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}
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if (a == INT32_MIN)
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return AVERROR_INVALIDDATA;
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ret = read_high_coeffs(avctx, ptr + bytestream2_tell(&ctx->gb), dest, size,
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c, (b >= FFABS(a)) ? b : a, d,
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ctx->band[plane][i + 1].width, stride);
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if (ret < 0) {
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av_log(avctx, AV_LOG_ERROR,
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"error in highpass coefficients for plane %d, band %d\n",
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plane, i);
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return ret;
|
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}
|
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bytestream2_skip(&ctx->gb, ret);
|
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}
|
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|
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return 0;
|
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}
|
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|
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static void lowpass_prediction(int16_t *dst, int16_t *pred,
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int width, int height, ptrdiff_t stride)
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{
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int16_t val;
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int i, j;
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||||
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memset(pred, 0, width * sizeof(*pred));
|
||||
|
||||
for (i = 0; i < height; i++) {
|
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val = pred[0] + dst[0];
|
||||
dst[0] = pred[0] = val;
|
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for (j = 1; j < width; j++) {
|
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val = pred[j] + dst[j];
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||||
dst[j] = pred[j] = val;
|
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dst[j] += dst[j-1];
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||||
}
|
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dst += stride;
|
||||
}
|
||||
}
|
||||
|
||||
static void filterfn(int16_t *dest, int16_t *tmp, unsigned size, int64_t scale)
|
||||
{
|
||||
int16_t *low, *high, *ll, *lh, *hl, *hh;
|
||||
int hsize, i, j;
|
||||
int64_t value;
|
||||
|
||||
hsize = size >> 1;
|
||||
low = tmp + 4;
|
||||
high = &low[hsize + 8];
|
||||
|
||||
memcpy(low, dest, size);
|
||||
memcpy(high, dest + hsize, size);
|
||||
|
||||
ll = &low[hsize];
|
||||
lh = &low[hsize];
|
||||
hl = &high[hsize];
|
||||
hh = hl;
|
||||
for (i = 4, j = 2; i; i--, j++, ll--, hh++, lh++, hl--) {
|
||||
low[i - 5] = low[j - 1];
|
||||
lh[0] = ll[-1];
|
||||
high[i - 5] = high[j - 2];
|
||||
hh[0] = hl[-2];
|
||||
}
|
||||
|
||||
for (i = 0; i < hsize; i++) {
|
||||
value = (int64_t) low [i + 1] * -INT64_C(325392907) +
|
||||
(int64_t) low [i + 0] * INT64_C(3687786320) +
|
||||
(int64_t) low [i - 1] * -INT64_C(325392907) +
|
||||
(int64_t) high[i + 0] * INT64_C(1518500249) +
|
||||
(int64_t) high[i - 1] * INT64_C(1518500249);
|
||||
dest[i * 2] = av_clip_int16(((value >> 32) * scale) >> 32);
|
||||
}
|
||||
|
||||
for (i = 0; i < hsize; i++) {
|
||||
value = (int64_t) low [i + 2] * -INT64_C(65078576) +
|
||||
(int64_t) low [i + 1] * INT64_C(1583578880) +
|
||||
(int64_t) low [i + 0] * INT64_C(1583578880) +
|
||||
(int64_t) low [i - 1] * -INT64_C(65078576) +
|
||||
(int64_t) high[i + 1] * INT64_C(303700064) +
|
||||
(int64_t) high[i + 0] * -INT64_C(3644400640) +
|
||||
(int64_t) high[i - 1] * INT64_C(303700064);
|
||||
dest[i * 2 + 1] = av_clip_int16(((value >> 32) * scale) >> 32);
|
||||
}
|
||||
}
|
||||
|
||||
static void reconstruction(AVCodecContext *avctx, int16_t *dest,
|
||||
unsigned width, unsigned height, ptrdiff_t stride,
|
||||
int64_t *scaling_h, int64_t *scaling_v)
|
||||
{
|
||||
PixletContext *ctx = avctx->priv_data;
|
||||
unsigned scaled_width, scaled_height;
|
||||
int16_t *ptr, *tmp;
|
||||
int i, j, k;
|
||||
|
||||
scaled_width = width >> NB_LEVELS;
|
||||
scaled_height = height >> NB_LEVELS;
|
||||
tmp = ctx->filter[0];
|
||||
|
||||
for (i = 0; i < NB_LEVELS; i++) {
|
||||
int64_t scale_v = scaling_v[i];
|
||||
int64_t scale_h = scaling_h[i];
|
||||
scaled_width <<= 1;
|
||||
scaled_height <<= 1;
|
||||
|
||||
ptr = dest;
|
||||
for (j = 0; j < scaled_height; j++) {
|
||||
filterfn(ptr, ctx->filter[1], scaled_width, scale_v);
|
||||
ptr += stride;
|
||||
}
|
||||
|
||||
for (j = 0; j < scaled_width; j++) {
|
||||
ptr = dest + j;
|
||||
for (k = 0; k < scaled_height; k++) {
|
||||
tmp[k] = *ptr;
|
||||
ptr += stride;
|
||||
}
|
||||
|
||||
filterfn(tmp, ctx->filter[1], scaled_height, scale_h);
|
||||
|
||||
ptr = dest + j;
|
||||
for (k = 0; k < scaled_height; k++) {
|
||||
*ptr = tmp[k];
|
||||
ptr += stride;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static void postprocess_luma(AVFrame *frame, int w, int h, int depth)
|
||||
{
|
||||
uint16_t *dsty = (uint16_t *)frame->data[0];
|
||||
int16_t *srcy = (int16_t *)frame->data[0];
|
||||
ptrdiff_t stridey = frame->linesize[0] / 2;
|
||||
int i, j;
|
||||
|
||||
for (j = 0; j < h; j++) {
|
||||
for (i = 0; i < w; i++) {
|
||||
if (srcy[i] <= 0)
|
||||
dsty[i] = 0;
|
||||
else if (srcy[i] > ((1 << depth) - 1))
|
||||
dsty[i] = 65535;
|
||||
else
|
||||
dsty[i] = ((int64_t) srcy[i] * srcy[i] * 65535) /
|
||||
((1 << depth) - 1) / ((1 << depth) - 1);
|
||||
}
|
||||
dsty += stridey;
|
||||
srcy += stridey;
|
||||
}
|
||||
}
|
||||
|
||||
static void postprocess_chroma(AVFrame *frame, int w, int h, int depth)
|
||||
{
|
||||
uint16_t *dstu = (uint16_t *)frame->data[1];
|
||||
uint16_t *dstv = (uint16_t *)frame->data[2];
|
||||
int16_t *srcu = (int16_t *)frame->data[1];
|
||||
int16_t *srcv = (int16_t *)frame->data[2];
|
||||
ptrdiff_t strideu = frame->linesize[1] / 2;
|
||||
ptrdiff_t stridev = frame->linesize[2] / 2;
|
||||
const unsigned add = 1 << (depth - 1);
|
||||
const unsigned shift = 16 - depth;
|
||||
int i, j;
|
||||
|
||||
for (j = 0; j < h; j++) {
|
||||
for (i = 0; i < w; i++) {
|
||||
dstu[i] = av_clip_uintp2_c(add + srcu[i], depth) << shift;
|
||||
dstv[i] = av_clip_uintp2_c(add + srcv[i], depth) << shift;
|
||||
}
|
||||
dstu += strideu;
|
||||
dstv += stridev;
|
||||
srcu += strideu;
|
||||
srcv += stridev;
|
||||
}
|
||||
}
|
||||
|
||||
static int decode_plane(AVCodecContext *avctx, int plane,
|
||||
AVPacket *avpkt, AVFrame *frame)
|
||||
{
|
||||
PixletContext *ctx = avctx->priv_data;
|
||||
ptrdiff_t stride = frame->linesize[plane] / 2;
|
||||
unsigned shift = plane > 0;
|
||||
int16_t *dst;
|
||||
int i, ret;
|
||||
|
||||
for (i = ctx->levels - 1; i >= 0; i--) {
|
||||
int32_t h = sign_extend(bytestream2_get_be32(&ctx->gb), 32);
|
||||
int32_t v = sign_extend(bytestream2_get_be32(&ctx->gb), 32);
|
||||
|
||||
if (!h || !v)
|
||||
return AVERROR_INVALIDDATA;
|
||||
|
||||
ctx->scaling[plane][H][i] = (1000000ULL << 32) / h;
|
||||
ctx->scaling[plane][V][i] = (1000000ULL << 32) / v;
|
||||
}
|
||||
|
||||
bytestream2_skip(&ctx->gb, 4);
|
||||
|
||||
dst = (int16_t *)frame->data[plane];
|
||||
dst[0] = sign_extend(bytestream2_get_be16(&ctx->gb), 16);
|
||||
|
||||
ret = init_get_bits8(&ctx->bc, avpkt->data + bytestream2_tell(&ctx->gb),
|
||||
bytestream2_get_bytes_left(&ctx->gb));
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
ret = read_low_coeffs(avctx, dst + 1, ctx->band[plane][0].width - 1,
|
||||
ctx->band[plane][0].width - 1, 0);
|
||||
if (ret < 0) {
|
||||
av_log(avctx, AV_LOG_ERROR,
|
||||
"error in lowpass coefficients for plane %d, top row\n", plane);
|
||||
return ret;
|
||||
}
|
||||
|
||||
ret = read_low_coeffs(avctx, dst + stride,
|
||||
ctx->band[plane][0].height - 1, 1, stride);
|
||||
if (ret < 0) {
|
||||
av_log(avctx, AV_LOG_ERROR,
|
||||
"error in lowpass coefficients for plane %d, left column\n",
|
||||
plane);
|
||||
return ret;
|
||||
}
|
||||
|
||||
ret = read_low_coeffs(avctx, dst + stride + 1,
|
||||
(ctx->band[plane][0].width - 1) * (ctx->band[plane][0].height - 1),
|
||||
ctx->band[plane][0].width - 1, stride);
|
||||
if (ret < 0) {
|
||||
av_log(avctx, AV_LOG_ERROR,
|
||||
"error in lowpass coefficients for plane %d, rest\n", plane);
|
||||
return ret;
|
||||
}
|
||||
|
||||
bytestream2_skip(&ctx->gb, ret);
|
||||
if (bytestream2_get_bytes_left(&ctx->gb) <= 0) {
|
||||
av_log(avctx, AV_LOG_ERROR, "no bytes left\n");
|
||||
return AVERROR_INVALIDDATA;
|
||||
}
|
||||
|
||||
ret = read_highpass(avctx, avpkt->data, plane, frame);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
lowpass_prediction(dst, ctx->prediction, ctx->band[plane][0].width,
|
||||
ctx->band[plane][0].height, stride);
|
||||
|
||||
reconstruction(avctx, (int16_t *)frame->data[plane], ctx->w >> shift,
|
||||
ctx->h >> shift, stride, ctx->scaling[plane][H],
|
||||
ctx->scaling[plane][V]);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int pixlet_decode_frame(AVCodecContext *avctx, void *data,
|
||||
int *got_frame, AVPacket *avpkt)
|
||||
{
|
||||
PixletContext *ctx = avctx->priv_data;
|
||||
int i, w, h, width, height, ret, version;
|
||||
AVFrame *p = data;
|
||||
ThreadFrame frame = { .f = data };
|
||||
uint32_t pktsize;
|
||||
|
||||
bytestream2_init(&ctx->gb, avpkt->data, avpkt->size);
|
||||
|
||||
pktsize = bytestream2_get_be32(&ctx->gb);
|
||||
if (pktsize <= 44 || pktsize - 4 > bytestream2_get_bytes_left(&ctx->gb)) {
|
||||
av_log(avctx, AV_LOG_ERROR, "Invalid packet size %"PRIu32"\n", pktsize);
|
||||
return AVERROR_INVALIDDATA;
|
||||
}
|
||||
|
||||
version = bytestream2_get_le32(&ctx->gb);
|
||||
if (version != 1)
|
||||
avpriv_request_sample(avctx, "Version %d", version);
|
||||
|
||||
bytestream2_skip(&ctx->gb, 4);
|
||||
if (bytestream2_get_be32(&ctx->gb) != 1)
|
||||
return AVERROR_INVALIDDATA;
|
||||
bytestream2_skip(&ctx->gb, 4);
|
||||
|
||||
width = bytestream2_get_be32(&ctx->gb);
|
||||
height = bytestream2_get_be32(&ctx->gb);
|
||||
|
||||
if ( width > INT_MAX - (1U << (NB_LEVELS + 1))
|
||||
|| height > INT_MAX - (1U << (NB_LEVELS + 1)))
|
||||
return AVERROR_INVALIDDATA;
|
||||
|
||||
w = FFALIGN(width, 1 << (NB_LEVELS + 1));
|
||||
h = FFALIGN(height, 1 << (NB_LEVELS + 1));
|
||||
|
||||
ctx->levels = bytestream2_get_be32(&ctx->gb);
|
||||
if (ctx->levels != NB_LEVELS)
|
||||
return AVERROR_INVALIDDATA;
|
||||
ctx->depth = bytestream2_get_be32(&ctx->gb);
|
||||
if (ctx->depth < 8 || ctx->depth > 15) {
|
||||
avpriv_request_sample(avctx, "Depth %d", ctx->depth);
|
||||
return AVERROR_INVALIDDATA;
|
||||
}
|
||||
|
||||
ret = ff_set_dimensions(avctx, w, h);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
avctx->width = width;
|
||||
avctx->height = height;
|
||||
|
||||
if (ctx->w != w || ctx->h != h) {
|
||||
free_buffers(avctx);
|
||||
ctx->w = w;
|
||||
ctx->h = h;
|
||||
|
||||
ret = init_decoder(avctx);
|
||||
if (ret < 0) {
|
||||
free_buffers(avctx);
|
||||
ctx->w = 0;
|
||||
ctx->h = 0;
|
||||
return ret;
|
||||
}
|
||||
}
|
||||
|
||||
bytestream2_skip(&ctx->gb, 8);
|
||||
|
||||
p->pict_type = AV_PICTURE_TYPE_I;
|
||||
p->key_frame = 1;
|
||||
p->color_range = AVCOL_RANGE_JPEG;
|
||||
|
||||
ret = ff_thread_get_buffer(avctx, &frame, 0);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
for (i = 0; i < 3; i++) {
|
||||
ret = decode_plane(avctx, i, avpkt, frame.f);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
if (avctx->flags & AV_CODEC_FLAG_GRAY)
|
||||
break;
|
||||
}
|
||||
|
||||
postprocess_luma(frame.f, ctx->w, ctx->h, ctx->depth);
|
||||
postprocess_chroma(frame.f, ctx->w >> 1, ctx->h >> 1, ctx->depth);
|
||||
|
||||
*got_frame = 1;
|
||||
|
||||
return pktsize;
|
||||
}
|
||||
|
||||
AVCodec ff_pixlet_decoder = {
|
||||
.name = "pixlet",
|
||||
.long_name = NULL_IF_CONFIG_SMALL("Apple Pixlet"),
|
||||
.type = AVMEDIA_TYPE_VIDEO,
|
||||
.id = AV_CODEC_ID_PIXLET,
|
||||
.init = pixlet_init,
|
||||
.close = pixlet_close,
|
||||
.decode = pixlet_decode_frame,
|
||||
.priv_data_size = sizeof(PixletContext),
|
||||
.capabilities = AV_CODEC_CAP_DR1 |
|
||||
AV_CODEC_CAP_FRAME_THREADS,
|
||||
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE |
|
||||
FF_CODEC_CAP_INIT_CLEANUP,
|
||||
};
|
||||
Reference in New Issue
Block a user