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FFmpeg/libavcodec/magicyuv.c
Anton Khirnov 1f4cf92cfb pthread_frame: merge the functionality for normal decoder init and init_thread_copy 
The current design, where
- proper init is called for the first per-thread context
- first thread's private data is copied into private data for all the
  other threads
- a "fixup" function is called for all the other threads to e.g.
  allocate dynamically allocated data
is very fragile and hard to follow, so it is abandoned. Instead, the
same init function is used to init each per-thread context. Where
necessary, AVCodecInternal.is_copy can be used to differentiate between
the first thread and the other ones (e.g. for decoding the extradata
just once).
2020-04-10 15:24:54 +02:00

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/*
* MagicYUV decoder
* Copyright (c) 2016 Paul B Mahol
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdlib.h>
#include <string.h>
#include "libavutil/pixdesc.h"
#include "libavutil/qsort.h"
#include "avcodec.h"
#include "bytestream.h"
#include "get_bits.h"
#include "huffyuvdsp.h"
#include "internal.h"
#include "lossless_videodsp.h"
#include "thread.h"
typedef struct Slice {
uint32_t start;
uint32_t size;
} Slice;
typedef enum Prediction {
LEFT = 1,
GRADIENT,
MEDIAN,
} Prediction;
typedef struct HuffEntry {
uint16_t sym;
uint8_t len;
uint32_t code;
} HuffEntry;
typedef struct MagicYUVContext {
AVFrame *p;
int max;
int bps;
int slice_height;
int nb_slices;
int planes; // number of encoded planes in bitstream
int decorrelate; // postprocessing work
int color_matrix; // video color matrix
int flags;
int interlaced; // video is interlaced
uint8_t *buf; // pointer to AVPacket->data
int hshift[4];
int vshift[4];
Slice *slices[4]; // slice bitstream positions for each plane
unsigned int slices_size[4]; // slice sizes for each plane
uint8_t len[4][4096]; // table of code lengths for each plane
VLC vlc[4]; // VLC for each plane
int (*huff_build)(VLC *vlc, uint8_t *len);
int (*magy_decode_slice)(AVCodecContext *avctx, void *tdata,
int j, int threadnr);
LLVidDSPContext llviddsp;
} MagicYUVContext;
static int huff_cmp_len(const void *a, const void *b)
{
const HuffEntry *aa = a, *bb = b;
return (aa->len - bb->len) * 256 + aa->sym - bb->sym;
}
static int huff_cmp_len10(const void *a, const void *b)
{
const HuffEntry *aa = a, *bb = b;
return (aa->len - bb->len) * 1024 + aa->sym - bb->sym;
}
static int huff_cmp_len12(const void *a, const void *b)
{
const HuffEntry *aa = a, *bb = b;
return (aa->len - bb->len) * 4096 + aa->sym - bb->sym;
}
static int huff_build10(VLC *vlc, uint8_t *len)
{
HuffEntry he[1024];
uint32_t codes[1024];
uint8_t bits[1024];
uint16_t syms[1024];
uint32_t code;
int i;
for (i = 0; i < 1024; i++) {
he[i].sym = 1023 - i;
he[i].len = len[i];
if (len[i] == 0 || len[i] > 32)
return AVERROR_INVALIDDATA;
}
AV_QSORT(he, 1024, HuffEntry, huff_cmp_len10);
code = 1;
for (i = 1023; i >= 0; i--) {
codes[i] = code >> (32 - he[i].len);
bits[i] = he[i].len;
syms[i] = he[i].sym;
code += 0x80000000u >> (he[i].len - 1);
}
ff_free_vlc(vlc);
return ff_init_vlc_sparse(vlc, FFMIN(he[1023].len, 12), 1024,
bits, sizeof(*bits), sizeof(*bits),
codes, sizeof(*codes), sizeof(*codes),
syms, sizeof(*syms), sizeof(*syms), 0);
}
static int huff_build12(VLC *vlc, uint8_t *len)
{
HuffEntry he[4096];
uint32_t codes[4096];
uint8_t bits[4096];
uint16_t syms[4096];
uint32_t code;
int i;
for (i = 0; i < 4096; i++) {
he[i].sym = 4095 - i;
he[i].len = len[i];
if (len[i] == 0 || len[i] > 32)
return AVERROR_INVALIDDATA;
}
AV_QSORT(he, 4096, HuffEntry, huff_cmp_len12);
code = 1;
for (i = 4095; i >= 0; i--) {
codes[i] = code >> (32 - he[i].len);
bits[i] = he[i].len;
syms[i] = he[i].sym;
code += 0x80000000u >> (he[i].len - 1);
}
ff_free_vlc(vlc);
return ff_init_vlc_sparse(vlc, FFMIN(he[4095].len, 14), 4096,
bits, sizeof(*bits), sizeof(*bits),
codes, sizeof(*codes), sizeof(*codes),
syms, sizeof(*syms), sizeof(*syms), 0);
}
static int huff_build(VLC *vlc, uint8_t *len)
{
HuffEntry he[256];
uint32_t codes[256];
uint8_t bits[256];
uint8_t syms[256];
uint32_t code;
int i;
for (i = 0; i < 256; i++) {
he[i].sym = 255 - i;
he[i].len = len[i];
if (len[i] == 0 || len[i] > 32)
return AVERROR_INVALIDDATA;
}
AV_QSORT(he, 256, HuffEntry, huff_cmp_len);
code = 1;
for (i = 255; i >= 0; i--) {
codes[i] = code >> (32 - he[i].len);
bits[i] = he[i].len;
syms[i] = he[i].sym;
code += 0x80000000u >> (he[i].len - 1);
}
ff_free_vlc(vlc);
return ff_init_vlc_sparse(vlc, FFMIN(he[255].len, 12), 256,
bits, sizeof(*bits), sizeof(*bits),
codes, sizeof(*codes), sizeof(*codes),
syms, sizeof(*syms), sizeof(*syms), 0);
}
static void magicyuv_median_pred16(uint16_t *dst, const uint16_t *src1,
const uint16_t *diff, intptr_t w,
int *left, int *left_top, int max)
{
int i;
uint16_t l, lt;
l = *left;
lt = *left_top;
for (i = 0; i < w; i++) {
l = mid_pred(l, src1[i], (l + src1[i] - lt)) + diff[i];
l &= max;
lt = src1[i];
dst[i] = l;
}
*left = l;
*left_top = lt;
}
static int magy_decode_slice10(AVCodecContext *avctx, void *tdata,
int j, int threadnr)
{
MagicYUVContext *s = avctx->priv_data;
int interlaced = s->interlaced;
const int bps = s->bps;
const int max = s->max - 1;
AVFrame *p = s->p;
int i, k, x;
GetBitContext gb;
uint16_t *dst;
for (i = 0; i < s->planes; i++) {
int left, lefttop, top;
int height = AV_CEIL_RSHIFT(FFMIN(s->slice_height, avctx->coded_height - j * s->slice_height), s->vshift[i]);
int width = AV_CEIL_RSHIFT(avctx->coded_width, s->hshift[i]);
int sheight = AV_CEIL_RSHIFT(s->slice_height, s->vshift[i]);
ptrdiff_t fake_stride = (p->linesize[i] / 2) * (1 + interlaced);
ptrdiff_t stride = p->linesize[i] / 2;
int flags, pred;
int ret = init_get_bits8(&gb, s->buf + s->slices[i][j].start,
s->slices[i][j].size);
if (ret < 0)
return ret;
flags = get_bits(&gb, 8);
pred = get_bits(&gb, 8);
dst = (uint16_t *)p->data[i] + j * sheight * stride;
if (flags & 1) {
if (get_bits_left(&gb) < bps * width * height)
return AVERROR_INVALIDDATA;
for (k = 0; k < height; k++) {
for (x = 0; x < width; x++)
dst[x] = get_bits(&gb, bps);
dst += stride;
}
} else {
for (k = 0; k < height; k++) {
for (x = 0; x < width; x++) {
int pix;
if (get_bits_left(&gb) <= 0)
return AVERROR_INVALIDDATA;
pix = get_vlc2(&gb, s->vlc[i].table, s->vlc[i].bits, 3);
if (pix < 0)
return AVERROR_INVALIDDATA;
dst[x] = max - pix;
}
dst += stride;
}
}
switch (pred) {
case LEFT:
dst = (uint16_t *)p->data[i] + j * sheight * stride;
s->llviddsp.add_left_pred_int16(dst, dst, max, width, 0);
dst += stride;
if (interlaced) {
s->llviddsp.add_left_pred_int16(dst, dst, max, width, 0);
dst += stride;
}
for (k = 1 + interlaced; k < height; k++) {
s->llviddsp.add_left_pred_int16(dst, dst, max, width, dst[-fake_stride]);
dst += stride;
}
break;
case GRADIENT:
dst = (uint16_t *)p->data[i] + j * sheight * stride;
s->llviddsp.add_left_pred_int16(dst, dst, max, width, 0);
dst += stride;
if (interlaced) {
s->llviddsp.add_left_pred_int16(dst, dst, max, width, 0);
dst += stride;
}
for (k = 1 + interlaced; k < height; k++) {
top = dst[-fake_stride];
left = top + dst[0];
dst[0] = left & max;
for (x = 1; x < width; x++) {
top = dst[x - fake_stride];
lefttop = dst[x - (fake_stride + 1)];
left += top - lefttop + dst[x];
dst[x] = left & max;
}
dst += stride;
}
break;
case MEDIAN:
dst = (uint16_t *)p->data[i] + j * sheight * stride;
s->llviddsp.add_left_pred_int16(dst, dst, max, width, 0);
dst += stride;
if (interlaced) {
s->llviddsp.add_left_pred_int16(dst, dst, max, width, 0);
dst += stride;
}
lefttop = left = dst[0];
for (k = 1 + interlaced; k < height; k++) {
magicyuv_median_pred16(dst, dst - fake_stride, dst, width, &left, &lefttop, max);
lefttop = left = dst[0];
dst += stride;
}
break;
default:
avpriv_request_sample(avctx, "Unknown prediction: %d", pred);
}
}
if (s->decorrelate) {
int height = FFMIN(s->slice_height, avctx->coded_height - j * s->slice_height);
int width = avctx->coded_width;
uint16_t *r = (uint16_t *)p->data[0] + j * s->slice_height * p->linesize[0] / 2;
uint16_t *g = (uint16_t *)p->data[1] + j * s->slice_height * p->linesize[1] / 2;
uint16_t *b = (uint16_t *)p->data[2] + j * s->slice_height * p->linesize[2] / 2;
for (i = 0; i < height; i++) {
for (k = 0; k < width; k++) {
b[k] = (b[k] + g[k]) & max;
r[k] = (r[k] + g[k]) & max;
}
b += p->linesize[0] / 2;
g += p->linesize[1] / 2;
r += p->linesize[2] / 2;
}
}
return 0;
}
static int magy_decode_slice(AVCodecContext *avctx, void *tdata,
int j, int threadnr)
{
MagicYUVContext *s = avctx->priv_data;
int interlaced = s->interlaced;
AVFrame *p = s->p;
int i, k, x, min_width;
GetBitContext gb;
uint8_t *dst;
for (i = 0; i < s->planes; i++) {
int left, lefttop, top;
int height = AV_CEIL_RSHIFT(FFMIN(s->slice_height, avctx->coded_height - j * s->slice_height), s->vshift[i]);
int width = AV_CEIL_RSHIFT(avctx->coded_width, s->hshift[i]);
int sheight = AV_CEIL_RSHIFT(s->slice_height, s->vshift[i]);
ptrdiff_t fake_stride = p->linesize[i] * (1 + interlaced);
ptrdiff_t stride = p->linesize[i];
int flags, pred;
int ret = init_get_bits8(&gb, s->buf + s->slices[i][j].start,
s->slices[i][j].size);
if (ret < 0)
return ret;
flags = get_bits(&gb, 8);
pred = get_bits(&gb, 8);
dst = p->data[i] + j * sheight * stride;
if (flags & 1) {
if (get_bits_left(&gb) < 8* width * height)
return AVERROR_INVALIDDATA;
for (k = 0; k < height; k++) {
for (x = 0; x < width; x++)
dst[x] = get_bits(&gb, 8);
dst += stride;
}
} else {
for (k = 0; k < height; k++) {
for (x = 0; x < width; x++) {
int pix;
if (get_bits_left(&gb) <= 0)
return AVERROR_INVALIDDATA;
pix = get_vlc2(&gb, s->vlc[i].table, s->vlc[i].bits, 3);
if (pix < 0)
return AVERROR_INVALIDDATA;
dst[x] = 255 - pix;
}
dst += stride;
}
}
switch (pred) {
case LEFT:
dst = p->data[i] + j * sheight * stride;
s->llviddsp.add_left_pred(dst, dst, width, 0);
dst += stride;
if (interlaced) {
s->llviddsp.add_left_pred(dst, dst, width, 0);
dst += stride;
}
for (k = 1 + interlaced; k < height; k++) {
s->llviddsp.add_left_pred(dst, dst, width, dst[-fake_stride]);
dst += stride;
}
break;
case GRADIENT:
dst = p->data[i] + j * sheight * stride;
s->llviddsp.add_left_pred(dst, dst, width, 0);
dst += stride;
if (interlaced) {
s->llviddsp.add_left_pred(dst, dst, width, 0);
dst += stride;
}
min_width = FFMIN(width, 32);
for (k = 1 + interlaced; k < height; k++) {
top = dst[-fake_stride];
left = top + dst[0];
dst[0] = left;
for (x = 1; x < min_width; x++) { /* dsp need aligned 32 */
top = dst[x - fake_stride];
lefttop = dst[x - (fake_stride + 1)];
left += top - lefttop + dst[x];
dst[x] = left;
}
if (width > 32)
s->llviddsp.add_gradient_pred(dst + 32, fake_stride, width - 32);
dst += stride;
}
break;
case MEDIAN:
dst = p->data[i] + j * sheight * stride;
s->llviddsp.add_left_pred(dst, dst, width, 0);
dst += stride;
if (interlaced) {
s->llviddsp.add_left_pred(dst, dst, width, 0);
dst += stride;
}
lefttop = left = dst[0];
for (k = 1 + interlaced; k < height; k++) {
s->llviddsp.add_median_pred(dst, dst - fake_stride,
dst, width, &left, &lefttop);
lefttop = left = dst[0];
dst += stride;
}
break;
default:
avpriv_request_sample(avctx, "Unknown prediction: %d", pred);
}
}
if (s->decorrelate) {
int height = FFMIN(s->slice_height, avctx->coded_height - j * s->slice_height);
int width = avctx->coded_width;
uint8_t *b = p->data[0] + j * s->slice_height * p->linesize[0];
uint8_t *g = p->data[1] + j * s->slice_height * p->linesize[1];
uint8_t *r = p->data[2] + j * s->slice_height * p->linesize[2];
for (i = 0; i < height; i++) {
s->llviddsp.add_bytes(b, g, width);
s->llviddsp.add_bytes(r, g, width);
b += p->linesize[0];
g += p->linesize[1];
r += p->linesize[2];
}
}
return 0;
}
static int build_huffman(AVCodecContext *avctx, GetBitContext *gbit, int max)
{
MagicYUVContext *s = avctx->priv_data;
int i = 0, j = 0, k;
memset(s->len, 0, sizeof(s->len));
while (get_bits_left(gbit) >= 8) {
int b = get_bits(gbit, 1);
int x = get_bits(gbit, 7);
int l = get_bitsz(gbit, b * 8) + 1;
for (k = 0; k < l; k++)
if (j + k < max)
s->len[i][j + k] = x;
j += l;
if (j == max) {
j = 0;
if (s->huff_build(&s->vlc[i], s->len[i])) {
av_log(avctx, AV_LOG_ERROR, "Cannot build Huffman codes\n");
return AVERROR_INVALIDDATA;
}
i++;
if (i == s->planes) {
break;
}
} else if (j > max) {
av_log(avctx, AV_LOG_ERROR, "Invalid Huffman codes\n");
return AVERROR_INVALIDDATA;
}
}
if (i != s->planes) {
av_log(avctx, AV_LOG_ERROR, "Huffman tables too short\n");
return AVERROR_INVALIDDATA;
}
return 0;
}
static int magy_decode_frame(AVCodecContext *avctx, void *data,
int *got_frame, AVPacket *avpkt)
{
MagicYUVContext *s = avctx->priv_data;
ThreadFrame frame = { .f = data };
AVFrame *p = data;
GetByteContext gbyte;
GetBitContext gbit;
uint32_t first_offset, offset, next_offset, header_size, slice_width;
int width, height, format, version, table_size;
int ret, i, j;
bytestream2_init(&gbyte, avpkt->data, avpkt->size);
if (bytestream2_get_le32(&gbyte) != MKTAG('M', 'A', 'G', 'Y'))
return AVERROR_INVALIDDATA;
header_size = bytestream2_get_le32(&gbyte);
if (header_size < 32 || header_size >= avpkt->size) {
av_log(avctx, AV_LOG_ERROR,
"header or packet too small %"PRIu32"\n", header_size);
return AVERROR_INVALIDDATA;
}
version = bytestream2_get_byte(&gbyte);
if (version != 7) {
avpriv_request_sample(avctx, "Version %d", version);
return AVERROR_PATCHWELCOME;
}
s->hshift[1] =
s->vshift[1] =
s->hshift[2] =
s->vshift[2] = 0;
s->decorrelate = 0;
s->bps = 8;
format = bytestream2_get_byte(&gbyte);
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;
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;
if ( s->bps == 8)
s->huff_build = huff_build;
else
s->huff_build = s->bps == 10 ? huff_build10 : huff_build12;
s->planes = av_pix_fmt_count_planes(avctx->pix_fmt);
bytestream2_skip(&gbyte, 1);
s->color_matrix = bytestream2_get_byte(&gbyte);
s->flags = bytestream2_get_byte(&gbyte);
s->interlaced = !!(s->flags & 2);
bytestream2_skip(&gbyte, 3);
width = bytestream2_get_le32(&gbyte);
height = bytestream2_get_le32(&gbyte);
ret = ff_set_dimensions(avctx, width, height);
if (ret < 0)
return ret;
slice_width = bytestream2_get_le32(&gbyte);
if (slice_width != avctx->coded_width) {
avpriv_request_sample(avctx, "Slice width %"PRIu32, slice_width);
return AVERROR_PATCHWELCOME;
}
s->slice_height = bytestream2_get_le32(&gbyte);
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_skip(&gbyte, 4);
s->nb_slices = (avctx->coded_height + s->slice_height - 1) / s->slice_height;
if (s->nb_slices > INT_MAX / sizeof(Slice)) {
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;
}
}
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_le32(&gbyte);
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_le32(&gbyte);
if (next_offset <= offset || next_offset >= avpkt->size - header_size)
return AVERROR_INVALIDDATA;
s->slices[i][j].size = next_offset - offset;
offset = next_offset;
}
s->slices[i][j].start = offset + header_size;
s->slices[i][j].size = avpkt->size - s->slices[i][j].start;
}
if (bytestream2_get_byte(&gbyte) != s->planes)
return AVERROR_INVALIDDATA;
bytestream2_skip(&gbyte, s->nb_slices * s->planes);
table_size = header_size + first_offset - bytestream2_tell(&gbyte);
if (table_size < 2)
return AVERROR_INVALIDDATA;
ret = init_get_bits8(&gbit, avpkt->data + bytestream2_tell(&gbyte), table_size);
if (ret < 0)
return ret;
ret = build_huffman(avctx, &gbit, 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, &frame, 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;
}
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,
};
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