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FFmpeg/libavcodec/dnxhddec.c
Andreas Rheinhardt a247ac640d avcodec: Constify AVCodecs 
Given that the AVCodec.next pointer has now been removed, most of the
AVCodecs are not modified at all any more and can therefore be made
const (as this patch does); the only exceptions are the very few codecs
for external libraries that have a init_static_data callback.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
Signed-off-by: James Almer <jamrial@gmail.com>
2021-04-27 10:43:15 -03:00

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/*
* VC3/DNxHD decoder.
* Copyright (c) 2007 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com>
* Copyright (c) 2011 MirriAd Ltd
* Copyright (c) 2015 Christophe Gisquet
*
* 10 bit support added by MirriAd Ltd, Joseph Artsimovich <joseph@mirriad.com>
* Slice multithreading and MB interlaced support added by Christophe Gisquet
*
* 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 "libavutil/imgutils.h"
#include "libavutil/mem_internal.h"
#include "avcodec.h"
#include "blockdsp.h"
#define UNCHECKED_BITSTREAM_READER 1
#include "get_bits.h"
#include "dnxhddata.h"
#include "idctdsp.h"
#include "internal.h"
#include "profiles.h"
#include "thread.h"
typedef struct RowContext {
DECLARE_ALIGNED(32, int16_t, blocks)[12][64];
int luma_scale[64];
int chroma_scale[64];
GetBitContext gb;
int last_dc[3];
int last_qscale;
int errors;
/** -1:not set yet 0:off=RGB 1:on=YUV 2:variable */
int format;
} RowContext;
typedef struct DNXHDContext {
AVCodecContext *avctx;
RowContext *rows;
BlockDSPContext bdsp;
const uint8_t* buf;
int buf_size;
int64_t cid; ///< compression id
unsigned int width, height;
enum AVPixelFormat pix_fmt;
unsigned int mb_width, mb_height;
uint32_t mb_scan_index[512];
int data_offset; // End of mb_scan_index, where macroblocks start
int cur_field; ///< current interlaced field
VLC ac_vlc, dc_vlc, run_vlc;
IDCTDSPContext idsp;
ScanTable scantable;
const CIDEntry *cid_table;
int bit_depth; // 8, 10, 12 or 0 if not initialized at all.
int is_444;
int alpha;
int lla;
int mbaff;
int act;
int (*decode_dct_block)(const struct DNXHDContext *ctx,
RowContext *row, int n);
} DNXHDContext;
#define DNXHD_VLC_BITS 9
#define DNXHD_DC_VLC_BITS 7
static int dnxhd_decode_dct_block_8(const DNXHDContext *ctx,
RowContext *row, int n);
static int dnxhd_decode_dct_block_10(const DNXHDContext *ctx,
RowContext *row, int n);
static int dnxhd_decode_dct_block_10_444(const DNXHDContext *ctx,
RowContext *row, int n);
static int dnxhd_decode_dct_block_12(const DNXHDContext *ctx,
RowContext *row, int n);
static int dnxhd_decode_dct_block_12_444(const DNXHDContext *ctx,
RowContext *row, int n);
static av_cold int dnxhd_decode_init(AVCodecContext *avctx)
{
DNXHDContext *ctx = avctx->priv_data;
ctx->avctx = avctx;
ctx->cid = -1;
if (avctx->colorspace == AVCOL_SPC_UNSPECIFIED) {
avctx->colorspace = AVCOL_SPC_BT709;
}
avctx->coded_width = FFALIGN(avctx->width, 16);
avctx->coded_height = FFALIGN(avctx->height, 16);
ctx->rows = av_mallocz_array(avctx->thread_count, sizeof(RowContext));
if (!ctx->rows)
return AVERROR(ENOMEM);
return 0;
}
static int dnxhd_init_vlc(DNXHDContext *ctx, uint32_t cid, int bitdepth)
{
if (cid != ctx->cid) {
const CIDEntry *cid_table = ff_dnxhd_get_cid_table(cid);
if (!cid_table) {
av_log(ctx->avctx, AV_LOG_ERROR, "unsupported cid %"PRIu32"\n", cid);
return AVERROR(ENOSYS);
}
if (cid_table->bit_depth != bitdepth &&
cid_table->bit_depth != DNXHD_VARIABLE) {
av_log(ctx->avctx, AV_LOG_ERROR, "bit depth mismatches %d %d\n",
cid_table->bit_depth, bitdepth);
return AVERROR_INVALIDDATA;
}
ctx->cid_table = cid_table;
av_log(ctx->avctx, AV_LOG_VERBOSE, "Profile cid %"PRIu32".\n", cid);
ff_free_vlc(&ctx->ac_vlc);
ff_free_vlc(&ctx->dc_vlc);
ff_free_vlc(&ctx->run_vlc);
init_vlc(&ctx->ac_vlc, DNXHD_VLC_BITS, 257,
ctx->cid_table->ac_bits, 1, 1,
ctx->cid_table->ac_codes, 2, 2, 0);
init_vlc(&ctx->dc_vlc, DNXHD_DC_VLC_BITS, bitdepth > 8 ? 14 : 12,
ctx->cid_table->dc_bits, 1, 1,
ctx->cid_table->dc_codes, 1, 1, 0);
init_vlc(&ctx->run_vlc, DNXHD_VLC_BITS, 62,
ctx->cid_table->run_bits, 1, 1,
ctx->cid_table->run_codes, 2, 2, 0);
ctx->cid = cid;
}
return 0;
}
static int dnxhd_get_profile(int cid)
{
switch(cid) {
case 1270:
return FF_PROFILE_DNXHR_444;
case 1271:
return FF_PROFILE_DNXHR_HQX;
case 1272:
return FF_PROFILE_DNXHR_HQ;
case 1273:
return FF_PROFILE_DNXHR_SQ;
case 1274:
return FF_PROFILE_DNXHR_LB;
}
return FF_PROFILE_DNXHD;
}
static int dnxhd_decode_header(DNXHDContext *ctx, AVFrame *frame,
const uint8_t *buf, int buf_size,
int first_field)
{
int i, cid, ret;
int old_bit_depth = ctx->bit_depth, bitdepth;
uint64_t header_prefix;
if (buf_size < 0x280) {
av_log(ctx->avctx, AV_LOG_ERROR,
"buffer too small (%d < 640).\n", buf_size);
return AVERROR_INVALIDDATA;
}
header_prefix = ff_dnxhd_parse_header_prefix(buf);
if (header_prefix == 0) {
av_log(ctx->avctx, AV_LOG_ERROR,
"unknown header 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X\n",
buf[0], buf[1], buf[2], buf[3], buf[4]);
return AVERROR_INVALIDDATA;
}
if (buf[5] & 2) { /* interlaced */
ctx->cur_field = buf[5] & 1;
frame->interlaced_frame = 1;
frame->top_field_first = first_field ^ ctx->cur_field;
av_log(ctx->avctx, AV_LOG_DEBUG,
"interlaced %d, cur field %d\n", buf[5] & 3, ctx->cur_field);
} else {
ctx->cur_field = 0;
}
ctx->mbaff = (buf[0x6] >> 5) & 1;
ctx->alpha = buf[0x7] & 1;
ctx->lla = (buf[0x7] >> 1) & 1;
if (ctx->alpha)
avpriv_request_sample(ctx->avctx, "alpha");
ctx->height = AV_RB16(buf + 0x18);
ctx->width = AV_RB16(buf + 0x1a);
switch(buf[0x21] >> 5) {
case 1: bitdepth = 8; break;
case 2: bitdepth = 10; break;
case 3: bitdepth = 12; break;
default:
av_log(ctx->avctx, AV_LOG_ERROR,
"Unknown bitdepth indicator (%d)\n", buf[0x21] >> 5);
return AVERROR_INVALIDDATA;
}
cid = AV_RB32(buf + 0x28);
ctx->avctx->profile = dnxhd_get_profile(cid);
if ((ret = dnxhd_init_vlc(ctx, cid, bitdepth)) < 0)
return ret;
if (ctx->mbaff && ctx->cid_table->cid != 1260)
av_log(ctx->avctx, AV_LOG_WARNING,
"Adaptive MB interlace flag in an unsupported profile.\n");
switch ((buf[0x2C] >> 1) & 3) {
case 0: frame->colorspace = AVCOL_SPC_BT709; break;
case 1: frame->colorspace = AVCOL_SPC_BT2020_NCL; break;
case 2: frame->colorspace = AVCOL_SPC_BT2020_CL; break;
case 3: frame->colorspace = AVCOL_SPC_UNSPECIFIED; break;
}
ctx->act = buf[0x2C] & 1;
if (ctx->act && ctx->cid_table->cid != 1256 && ctx->cid_table->cid != 1270)
av_log(ctx->avctx, AV_LOG_WARNING,
"Adaptive color transform in an unsupported profile.\n");
ctx->is_444 = (buf[0x2C] >> 6) & 1;
if (ctx->is_444) {
if (bitdepth == 8) {
avpriv_request_sample(ctx->avctx, "4:4:4 8 bits");
return AVERROR_INVALIDDATA;
} else if (bitdepth == 10) {
ctx->decode_dct_block = dnxhd_decode_dct_block_10_444;
ctx->pix_fmt = ctx->act ? AV_PIX_FMT_YUV444P10
: AV_PIX_FMT_GBRP10;
} else {
ctx->decode_dct_block = dnxhd_decode_dct_block_12_444;
ctx->pix_fmt = ctx->act ? AV_PIX_FMT_YUV444P12
: AV_PIX_FMT_GBRP12;
}
} else if (bitdepth == 12) {
ctx->decode_dct_block = dnxhd_decode_dct_block_12;
ctx->pix_fmt = AV_PIX_FMT_YUV422P12;
} else if (bitdepth == 10) {
if (ctx->avctx->profile == FF_PROFILE_DNXHR_HQX)
ctx->decode_dct_block = dnxhd_decode_dct_block_10_444;
else
ctx->decode_dct_block = dnxhd_decode_dct_block_10;
ctx->pix_fmt = AV_PIX_FMT_YUV422P10;
} else {
ctx->decode_dct_block = dnxhd_decode_dct_block_8;
ctx->pix_fmt = AV_PIX_FMT_YUV422P;
}
ctx->avctx->bits_per_raw_sample = ctx->bit_depth = bitdepth;
if (ctx->bit_depth != old_bit_depth) {
ff_blockdsp_init(&ctx->bdsp, ctx->avctx);
ff_idctdsp_init(&ctx->idsp, ctx->avctx);
ff_init_scantable(ctx->idsp.idct_permutation, &ctx->scantable,
ff_zigzag_direct);
}
// make sure profile size constraints are respected
// DNx100 allows 1920->1440 and 1280->960 subsampling
if (ctx->width != ctx->cid_table->width &&
ctx->cid_table->width != DNXHD_VARIABLE) {
av_reduce(&ctx->avctx->sample_aspect_ratio.num,
&ctx->avctx->sample_aspect_ratio.den,
ctx->width, ctx->cid_table->width, 255);
ctx->width = ctx->cid_table->width;
}
if (buf_size < ctx->cid_table->coding_unit_size) {
av_log(ctx->avctx, AV_LOG_ERROR, "incorrect frame size (%d < %u).\n",
buf_size, ctx->cid_table->coding_unit_size);
return AVERROR_INVALIDDATA;
}
ctx->mb_width = (ctx->width + 15)>> 4;
ctx->mb_height = AV_RB16(buf + 0x16c);
if ((ctx->height + 15) >> 4 == ctx->mb_height && frame->interlaced_frame)
ctx->height <<= 1;
av_log(ctx->avctx, AV_LOG_VERBOSE, "%dx%d, 4:%s %d bits, MBAFF=%d ACT=%d\n",
ctx->width, ctx->height, ctx->is_444 ? "4:4" : "2:2",
ctx->bit_depth, ctx->mbaff, ctx->act);
// Newer format supports variable mb_scan_index sizes
if (ctx->mb_height > 68 && ff_dnxhd_check_header_prefix_hr(header_prefix)) {
ctx->data_offset = 0x170 + (ctx->mb_height << 2);
} else {
if (ctx->mb_height > 68) {
av_log(ctx->avctx, AV_LOG_ERROR,
"mb height too big: %d\n", ctx->mb_height);
return AVERROR_INVALIDDATA;
}
ctx->data_offset = 0x280;
}
if ((ctx->mb_height << frame->interlaced_frame) > (ctx->height + 15) >> 4) {
av_log(ctx->avctx, AV_LOG_ERROR,
"mb height too big: %d\n", ctx->mb_height);
return AVERROR_INVALIDDATA;
}
if (buf_size < ctx->data_offset) {
av_log(ctx->avctx, AV_LOG_ERROR,
"buffer too small (%d < %d).\n", buf_size, ctx->data_offset);
return AVERROR_INVALIDDATA;
}
if (ctx->mb_height > FF_ARRAY_ELEMS(ctx->mb_scan_index)) {
av_log(ctx->avctx, AV_LOG_ERROR,
"mb_height too big (%d > %"SIZE_SPECIFIER").\n", ctx->mb_height, FF_ARRAY_ELEMS(ctx->mb_scan_index));
return AVERROR_INVALIDDATA;
}
for (i = 0; i < ctx->mb_height; i++) {
ctx->mb_scan_index[i] = AV_RB32(buf + 0x170 + (i << 2));
ff_dlog(ctx->avctx, "mb scan index %d, pos %d: %"PRIu32"\n",
i, 0x170 + (i << 2), ctx->mb_scan_index[i]);
if (buf_size - ctx->data_offset < ctx->mb_scan_index[i]) {
av_log(ctx->avctx, AV_LOG_ERROR,
"invalid mb scan index (%"PRIu32" vs %u).\n",
ctx->mb_scan_index[i], buf_size - ctx->data_offset);
return AVERROR_INVALIDDATA;
}
}
return 0;
}
static av_always_inline int dnxhd_decode_dct_block(const DNXHDContext *ctx,
RowContext *row,
int n,
int index_bits,
int level_bias,
int level_shift,
int dc_shift)
{
int i, j, index1, index2, len, flags;
int level, component, sign;
const int *scale;
const uint8_t *weight_matrix;
const uint8_t *ac_info = ctx->cid_table->ac_info;
int16_t *block = row->blocks[n];
const int eob_index = ctx->cid_table->eob_index;
int ret = 0;
OPEN_READER(bs, &row->gb);
ctx->bdsp.clear_block(block);
if (!ctx->is_444) {
if (n & 2) {
component = 1 + (n & 1);
scale = row->chroma_scale;
weight_matrix = ctx->cid_table->chroma_weight;
} else {
component = 0;
scale = row->luma_scale;
weight_matrix = ctx->cid_table->luma_weight;
}
} else {
component = (n >> 1) % 3;
if (component) {
scale = row->chroma_scale;
weight_matrix = ctx->cid_table->chroma_weight;
} else {
scale = row->luma_scale;
weight_matrix = ctx->cid_table->luma_weight;
}
}
UPDATE_CACHE(bs, &row->gb);
GET_VLC(len, bs, &row->gb, ctx->dc_vlc.table, DNXHD_DC_VLC_BITS, 1);
if (len < 0) {
ret = len;
goto error;
}
if (len) {
level = GET_CACHE(bs, &row->gb);
LAST_SKIP_BITS(bs, &row->gb, len);
sign = ~level >> 31;
level = (NEG_USR32(sign ^ level, len) ^ sign) - sign;
row->last_dc[component] += level * (1 << dc_shift);
}
block[0] = row->last_dc[component];
i = 0;
UPDATE_CACHE(bs, &row->gb);
GET_VLC(index1, bs, &row->gb, ctx->ac_vlc.table,
DNXHD_VLC_BITS, 2);
while (index1 != eob_index) {
level = ac_info[2*index1+0];
flags = ac_info[2*index1+1];
sign = SHOW_SBITS(bs, &row->gb, 1);
SKIP_BITS(bs, &row->gb, 1);
if (flags & 1) {
level += SHOW_UBITS(bs, &row->gb, index_bits) << 7;
SKIP_BITS(bs, &row->gb, index_bits);
}
if (flags & 2) {
UPDATE_CACHE(bs, &row->gb);
GET_VLC(index2, bs, &row->gb, ctx->run_vlc.table,
DNXHD_VLC_BITS, 2);
i += ctx->cid_table->run[index2];
}
if (++i > 63) {
av_log(ctx->avctx, AV_LOG_ERROR, "ac tex damaged %d, %d\n", n, i);
ret = -1;
break;
}
j = ctx->scantable.permutated[i];
level *= scale[i];
level += scale[i] >> 1;
if (level_bias < 32 || weight_matrix[i] != level_bias)
level += level_bias; // 1<<(level_shift-1)
level >>= level_shift;
block[j] = (level ^ sign) - sign;
UPDATE_CACHE(bs, &row->gb);
GET_VLC(index1, bs, &row->gb, ctx->ac_vlc.table,
DNXHD_VLC_BITS, 2);
}
error:
CLOSE_READER(bs, &row->gb);
return ret;
}
static int dnxhd_decode_dct_block_8(const DNXHDContext *ctx,
RowContext *row, int n)
{
return dnxhd_decode_dct_block(ctx, row, n, 4, 32, 6, 0);
}
static int dnxhd_decode_dct_block_10(const DNXHDContext *ctx,
RowContext *row, int n)
{
return dnxhd_decode_dct_block(ctx, row, n, 6, 8, 4, 0);
}
static int dnxhd_decode_dct_block_10_444(const DNXHDContext *ctx,
RowContext *row, int n)
{
return dnxhd_decode_dct_block(ctx, row, n, 6, 32, 6, 0);
}
static int dnxhd_decode_dct_block_12(const DNXHDContext *ctx,
RowContext *row, int n)
{
return dnxhd_decode_dct_block(ctx, row, n, 6, 8, 4, 2);
}
static int dnxhd_decode_dct_block_12_444(const DNXHDContext *ctx,
RowContext *row, int n)
{
return dnxhd_decode_dct_block(ctx, row, n, 6, 32, 4, 2);
}
static int dnxhd_decode_macroblock(const DNXHDContext *ctx, RowContext *row,
AVFrame *frame, int x, int y)
{
int shift1 = ctx->bit_depth >= 10;
int dct_linesize_luma = frame->linesize[0];
int dct_linesize_chroma = frame->linesize[1];
uint8_t *dest_y, *dest_u, *dest_v;
int dct_y_offset, dct_x_offset;
int qscale, i, act;
int interlaced_mb = 0;
if (ctx->mbaff) {
interlaced_mb = get_bits1(&row->gb);
qscale = get_bits(&row->gb, 10);
} else {
qscale = get_bits(&row->gb, 11);
}
act = get_bits1(&row->gb);
if (act) {
if (!ctx->act) {
static int act_warned;
if (!act_warned) {
act_warned = 1;
av_log(ctx->avctx, AV_LOG_ERROR,
"ACT flag set, in violation of frame header.\n");
}
} else if (row->format == -1) {
row->format = act;
} else if (row->format != act) {
row->format = 2; // Variable
}
}
if (qscale != row->last_qscale) {
for (i = 0; i < 64; i++) {
row->luma_scale[i] = qscale * ctx->cid_table->luma_weight[i];
row->chroma_scale[i] = qscale * ctx->cid_table->chroma_weight[i];
}
row->last_qscale = qscale;
}
for (i = 0; i < 8 + 4 * ctx->is_444; i++) {
if (ctx->decode_dct_block(ctx, row, i) < 0)
return AVERROR_INVALIDDATA;
}
if (frame->interlaced_frame) {
dct_linesize_luma <<= 1;
dct_linesize_chroma <<= 1;
}
dest_y = frame->data[0] + ((y * dct_linesize_luma) << 4) + (x << (4 + shift1));
dest_u = frame->data[1] + ((y * dct_linesize_chroma) << 4) + (x << (3 + shift1 + ctx->is_444));
dest_v = frame->data[2] + ((y * dct_linesize_chroma) << 4) + (x << (3 + shift1 + ctx->is_444));
if (frame->interlaced_frame && ctx->cur_field) {
dest_y += frame->linesize[0];
dest_u += frame->linesize[1];
dest_v += frame->linesize[2];
}
if (interlaced_mb) {
dct_linesize_luma <<= 1;
dct_linesize_chroma <<= 1;
}
dct_y_offset = interlaced_mb ? frame->linesize[0] : (dct_linesize_luma << 3);
dct_x_offset = 8 << shift1;
if (!ctx->is_444) {
ctx->idsp.idct_put(dest_y, dct_linesize_luma, row->blocks[0]);
ctx->idsp.idct_put(dest_y + dct_x_offset, dct_linesize_luma, row->blocks[1]);
ctx->idsp.idct_put(dest_y + dct_y_offset, dct_linesize_luma, row->blocks[4]);
ctx->idsp.idct_put(dest_y + dct_y_offset + dct_x_offset, dct_linesize_luma, row->blocks[5]);
if (!(ctx->avctx->flags & AV_CODEC_FLAG_GRAY)) {
dct_y_offset = interlaced_mb ? frame->linesize[1] : (dct_linesize_chroma << 3);
ctx->idsp.idct_put(dest_u, dct_linesize_chroma, row->blocks[2]);
ctx->idsp.idct_put(dest_v, dct_linesize_chroma, row->blocks[3]);
ctx->idsp.idct_put(dest_u + dct_y_offset, dct_linesize_chroma, row->blocks[6]);
ctx->idsp.idct_put(dest_v + dct_y_offset, dct_linesize_chroma, row->blocks[7]);
}
} else {
ctx->idsp.idct_put(dest_y, dct_linesize_luma, row->blocks[0]);
ctx->idsp.idct_put(dest_y + dct_x_offset, dct_linesize_luma, row->blocks[1]);
ctx->idsp.idct_put(dest_y + dct_y_offset, dct_linesize_luma, row->blocks[6]);
ctx->idsp.idct_put(dest_y + dct_y_offset + dct_x_offset, dct_linesize_luma, row->blocks[7]);
if (!(ctx->avctx->flags & AV_CODEC_FLAG_GRAY)) {
dct_y_offset = interlaced_mb ? frame->linesize[1] : (dct_linesize_chroma << 3);
ctx->idsp.idct_put(dest_u, dct_linesize_chroma, row->blocks[2]);
ctx->idsp.idct_put(dest_u + dct_x_offset, dct_linesize_chroma, row->blocks[3]);
ctx->idsp.idct_put(dest_u + dct_y_offset, dct_linesize_chroma, row->blocks[8]);
ctx->idsp.idct_put(dest_u + dct_y_offset + dct_x_offset, dct_linesize_chroma, row->blocks[9]);
ctx->idsp.idct_put(dest_v, dct_linesize_chroma, row->blocks[4]);
ctx->idsp.idct_put(dest_v + dct_x_offset, dct_linesize_chroma, row->blocks[5]);
ctx->idsp.idct_put(dest_v + dct_y_offset, dct_linesize_chroma, row->blocks[10]);
ctx->idsp.idct_put(dest_v + dct_y_offset + dct_x_offset, dct_linesize_chroma, row->blocks[11]);
}
}
return 0;
}
static int dnxhd_decode_row(AVCodecContext *avctx, void *data,
int rownb, int threadnb)
{
const DNXHDContext *ctx = avctx->priv_data;
uint32_t offset = ctx->mb_scan_index[rownb];
RowContext *row = ctx->rows + threadnb;
int x, ret;
row->last_dc[0] =
row->last_dc[1] =
row->last_dc[2] = 1 << (ctx->bit_depth + 2); // for levels +2^(bitdepth-1)
ret = init_get_bits8(&row->gb, ctx->buf + offset, ctx->buf_size - offset);
if (ret < 0) {
row->errors++;
return ret;
}
for (x = 0; x < ctx->mb_width; x++) {
int ret = dnxhd_decode_macroblock(ctx, row, data, x, rownb);
if (ret < 0) {
row->errors++;
return ret;
}
}
return 0;
}
static int dnxhd_decode_frame(AVCodecContext *avctx, void *data,
int *got_frame, AVPacket *avpkt)
{
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
DNXHDContext *ctx = avctx->priv_data;
ThreadFrame frame = { .f = data };
AVFrame *picture = data;
int first_field = 1;
int ret, i;
ff_dlog(avctx, "frame size %d\n", buf_size);
for (i = 0; i < avctx->thread_count; i++)
ctx->rows[i].format = -1;
decode_coding_unit:
if ((ret = dnxhd_decode_header(ctx, picture, buf, buf_size, first_field)) < 0)
return ret;
if ((avctx->width || avctx->height) &&
(ctx->width != avctx->width || ctx->height != avctx->height)) {
av_log(avctx, AV_LOG_WARNING, "frame size changed: %dx%d -> %ux%u\n",
avctx->width, avctx->height, ctx->width, ctx->height);
first_field = 1;
}
if (avctx->pix_fmt != AV_PIX_FMT_NONE && avctx->pix_fmt != ctx->pix_fmt) {
av_log(avctx, AV_LOG_WARNING, "pix_fmt changed: %s -> %s\n",
av_get_pix_fmt_name(avctx->pix_fmt), av_get_pix_fmt_name(ctx->pix_fmt));
first_field = 1;
}
avctx->pix_fmt = ctx->pix_fmt;
ret = ff_set_dimensions(avctx, ctx->width, ctx->height);
if (ret < 0)
return ret;
if (first_field) {
if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
return ret;
picture->pict_type = AV_PICTURE_TYPE_I;
picture->key_frame = 1;
}
ctx->buf_size = buf_size - ctx->data_offset;
ctx->buf = buf + ctx->data_offset;
avctx->execute2(avctx, dnxhd_decode_row, picture, NULL, ctx->mb_height);
if (first_field && picture->interlaced_frame) {
buf += ctx->cid_table->coding_unit_size;
buf_size -= ctx->cid_table->coding_unit_size;
first_field = 0;
goto decode_coding_unit;
}
ret = 0;
for (i = 0; i < avctx->thread_count; i++) {
ret += ctx->rows[i].errors;
ctx->rows[i].errors = 0;
}
if (ctx->act) {
static int act_warned;
int format = ctx->rows[0].format;
for (i = 1; i < avctx->thread_count; i++) {
if (ctx->rows[i].format != format &&
ctx->rows[i].format != -1 /* not run */) {
format = 2;
break;
}
}
switch (format) {
case -1:
case 2:
if (!act_warned) {
act_warned = 1;
av_log(ctx->avctx, AV_LOG_ERROR,
"Unsupported: variable ACT flag.\n");
}
break;
case 0:
ctx->pix_fmt = ctx->bit_depth==10
? AV_PIX_FMT_GBRP10 : AV_PIX_FMT_GBRP12;
break;
case 1:
ctx->pix_fmt = ctx->bit_depth==10
? AV_PIX_FMT_YUV444P10 : AV_PIX_FMT_YUV444P12;
break;
}
}
avctx->pix_fmt = ctx->pix_fmt;
if (ret) {
av_log(ctx->avctx, AV_LOG_ERROR, "%d lines with errors\n", ret);
return AVERROR_INVALIDDATA;
}
*got_frame = 1;
return avpkt->size;
}
static av_cold int dnxhd_decode_close(AVCodecContext *avctx)
{
DNXHDContext *ctx = avctx->priv_data;
ff_free_vlc(&ctx->ac_vlc);
ff_free_vlc(&ctx->dc_vlc);
ff_free_vlc(&ctx->run_vlc);
av_freep(&ctx->rows);
return 0;
}
const AVCodec ff_dnxhd_decoder = {
.name = "dnxhd",
.long_name = NULL_IF_CONFIG_SMALL("VC3/DNxHD"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_DNXHD,
.priv_data_size = sizeof(DNXHDContext),
.init = dnxhd_decode_init,
.close = dnxhd_decode_close,
.decode = dnxhd_decode_frame,
.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS |
AV_CODEC_CAP_SLICE_THREADS,
.profiles = NULL_IF_CONFIG_SMALL(ff_dnxhd_profiles),
};
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